cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-10 of 11 results. Next

A240778 Number of n X 3 0..1 arrays with no element equal to fewer vertical neighbors than horizontal neighbors, with new values 0..1 introduced in row major order.

Original entry on oeis.org

1, 4, 20, 97, 459, 2187, 10442, 49861, 238068, 1136678, 5427201, 25912833, 123723975, 590735140, 2820536641, 13466994652, 64299801122, 307007207679, 1465843189533, 6998846289463, 33416841401200, 159552766705917
Offset: 1

Views

Author

R. H. Hardin, Apr 12 2014

Keywords

Examples

			Some solutions for n=4:
..0..1..0....0..1..0....0..1..0....0..1..0....0..1..0....0..1..0....0..1..0
..0..1..1....1..0..1....0..1..0....0..1..0....0..1..0....1..0..1....1..1..0
..0..1..1....0..1..1....1..0..1....1..1..0....0..0..1....1..1..0....1..0..0
..0..1..0....0..1..0....0..1..0....1..1..0....1..0..1....0..1..0....1..0..0
		

Crossrefs

Column 3 of A240783.

Formula

Empirical: a(n) = 5*a(n-1) - a(n-2) - a(n-3) + 4*a(n-4) - 4*a(n-5) - 3*a(n-6) + a(n-7).
Empirical g.f.: x*(1 + x)^2*(1 - 3*x + 6*x^2 - 7*x^3 + 2*x^4) / ((1 - x)*(1 - 4*x - 3*x^2 - 2*x^3 - 6*x^4 - 2*x^5 + x^6)). - Colin Barker, Oct 29 2018

A240779 Number of nX4 0..1 arrays with no element equal to fewer vertical neighbors than horizontal neighbors, with new values 0..1 introduced in row major order.

Original entry on oeis.org

1, 6, 46, 305, 2167, 15332, 108509, 767834, 5434887, 38467875, 272273018, 1927138748, 13640213436, 96544878838, 683340799760, 4836658942731, 34233678967243, 242304613789940, 1715022389014131, 12138860042126682
Offset: 1

Views

Author

R. H. Hardin, Apr 12 2014

Keywords

Comments

Column 4 of A240783

Examples

			Some solutions for n=4
..0..0..1..0....0..1..1..0....0..1..0..1....0..1..0..0....0..1..0..1
..0..0..1..0....1..1..1..0....0..0..1..1....1..1..0..0....1..0..0..1
..0..1..0..1....1..1..0..1....1..0..1..1....1..1..0..0....1..0..1..1
..0..1..0..1....1..0..1..0....1..0..1..0....0..1..0..1....1..0..1..1
		

Formula

Empirical: a(n) = 7*a(n-1) +2*a(n-2) -7*a(n-3) -25*a(n-4) -6*a(n-5) +150*a(n-6) +12*a(n-7) -456*a(n-8) -134*a(n-9) +408*a(n-10) +116*a(n-11) -171*a(n-12) +73*a(n-13) +388*a(n-14) +87*a(n-15) -127*a(n-16) -168*a(n-17) -62*a(n-18) -12*a(n-19) +16*a(n-20) +8*a(n-21) +2*a(n-22)

A240780 Number of nX5 0..1 arrays with no element equal to fewer vertical neighbors than horizontal neighbors, with new values 0..1 introduced in row major order.

Original entry on oeis.org

1, 9, 97, 959, 10150, 106411, 1120383, 11791412, 124095989, 1306056075, 13745692417, 144667727920, 1522567835402, 16024396462730, 168650144696133, 1774973019338383, 18680856897784860, 196608292474782756
Offset: 1

Views

Author

R. H. Hardin, Apr 12 2014

Keywords

Comments

Column 5 of A240783

Examples

			Some solutions for n=4
..0..1..1..0..1....0..1..0..1..1....0..1..0..1..0....0..1..0..1..0
..0..1..1..0..1....1..0..1..1..1....1..0..1..0..0....1..0..1..0..1
..0..1..1..0..0....1..0..1..1..1....1..1..0..0..1....1..1..0..0..1
..1..0..1..0..0....0..1..0..1..0....1..1..0..1..0....0..1..0..0..1
		

Formula

Empirical: a(n) = 11*a(n-1) +7*a(n-2) -123*a(n-3) -100*a(n-4) +564*a(n-5) +1376*a(n-6) -850*a(n-7) -2574*a(n-8) -15069*a(n-9) -48432*a(n-10) +116629*a(n-11) +324534*a(n-12) -546638*a(n-13) -1305652*a(n-14) +1415839*a(n-15) +2861430*a(n-16) -181783*a(n-17) +1142736*a(n-18) -3485531*a(n-19) +103541*a(n-20) +3757015*a(n-21) -3932650*a(n-22) -2493412*a(n-23) +1567853*a(n-24) +1326412*a(n-25) -3258442*a(n-26) -317605*a(n-27) -4294565*a(n-28) -451364*a(n-29) -983122*a(n-30) +1528646*a(n-31) +4998901*a(n-32) +2015845*a(n-33) -351008*a(n-34) +1590161*a(n-35) +241188*a(n-36) -1593888*a(n-37) -938771*a(n-38) -106281*a(n-39) +189935*a(n-40) +114894*a(n-41) -8940*a(n-42) -15519*a(n-43) +17746*a(n-44) +13164*a(n-45) -7056*a(n-46) -7716*a(n-47) +20*a(n-48) +1377*a(n-49) +35*a(n-50) -3*a(n-51) +38*a(n-52) -8*a(n-53) -4*a(n-54)

A240781 Number of nX6 0..1 arrays with no element equal to fewer vertical neighbors than horizontal neighbors, with new values 0..1 introduced in row major order.

Original entry on oeis.org

1, 14, 216, 3033, 47920, 746346, 11677893, 182610635, 2856212777, 44672652785, 698693379107, 10927826665165, 170915403140645, 2673181219816234, 41809560933557091, 653917302030513863, 10227513198350314599
Offset: 1

Views

Author

R. H. Hardin, Apr 12 2014

Keywords

Comments

Column 6 of A240783

Examples

			Some solutions for n=4
..0..1..1..0..1..0....0..1..1..0..1..0....0..1..0..1..0..1....0..1..0..1..0..1
..0..1..1..0..0..1....0..1..1..0..1..1....1..0..1..0..0..1....0..1..0..1..1..0
..1..1..0..1..0..0....1..0..1..1..0..1....0..0..1..0..0..1....0..0..1..0..1..1
..1..0..1..0..1..0....0..1..0..1..0..1....0..0..1..0..0..1....1..0..1..0..1..1
		

A240782 Number of nX7 0..1 arrays with no element equal to fewer vertical neighbors than horizontal neighbors, with new values 0..1 introduced in row major order.

Original entry on oeis.org

1, 22, 472, 9581, 226532, 5228820, 121621207, 2827515311, 65742420202, 1528546759636, 35539596883248, 826313572773202, 19212201839186636, 446693206688680120, 10385838163314549709, 241475873187832394155
Offset: 1

Views

Author

R. H. Hardin, Apr 12 2014

Keywords

Comments

Column 7 of A240783

Examples

			Some solutions for n=4
..0..1..1..0..1..0..1....0..0..1..1..0..0..1....0..1..1..0..1..1..0
..1..1..1..0..1..0..1....0..0..1..1..0..0..0....1..1..1..0..1..1..0
..1..1..0..1..0..0..1....0..1..0..1..1..0..0....1..1..1..0..1..0..0
..1..1..0..1..0..0..1....0..1..0..1..1..0..1....0..1..1..0..1..0..1
		

A240784 Number of 3 X n 0..1 arrays with no element equal to fewer vertical neighbors than horizontal neighbors, with new values 0..1 introduced in row major order.

Original entry on oeis.org

4, 11, 20, 46, 97, 216, 472, 1043, 2296, 5066, 11169, 24636, 54332, 119835, 264300, 582934, 1285697, 2835696, 6254320, 13794339, 30424368, 67103058, 148000449, 326425268, 719953588, 1587907627, 3502240516, 7724434622, 17036776865
Offset: 1

Views

Author

R. H. Hardin, Apr 12 2014

Keywords

Examples

			Some solutions for n=4:
..0..0..1..1....0..1..0..1....0..0..1..1....0..0..1..0....0..1..0..0
..0..0..1..1....1..0..0..1....0..0..1..1....0..0..1..0....1..0..0..0
..1..0..1..1....1..0..0..1....0..1..0..1....0..0..1..0....1..0..0..1
		

Crossrefs

Row 3 of A240783.

Formula

Empirical: a(n) = 2*a(n-1) + a(n-2) - a(n-3) - a(n-5).
Empirical g.f.: x*(4 + 3*x - 6*x^2 - x^3 - 4*x^4) / ((1 - x)*(1 + x)*(1 - 2*x - x^3)). - Colin Barker, Oct 29 2018

A240785 Number of 4Xn 0..1 arrays with no element equal to fewer vertical neighbors than horizontal neighbors, with new values 0..1 introduced in row major order.

Original entry on oeis.org

8, 34, 97, 305, 959, 3033, 9581, 30354, 96122, 304551, 964960, 3057691, 9689250, 30704176, 97298863, 308333649, 977091497, 3096352093, 9812187127, 31094352992, 98536547134, 312257747281, 989530396718, 3135776321313, 9937131194560
Offset: 1

Views

Author

R. H. Hardin, Apr 12 2014

Keywords

Comments

Row 4 of A240783

Examples

			Some solutions for n=4
..0..0..1..0....0..1..1..0....0..1..0..1....0..0..1..0....0..1..0..1
..0..0..1..1....1..1..1..0....1..1..0..1....0..0..1..0....0..1..1..0
..1..0..0..1....1..1..0..1....1..1..0..1....1..1..0..0....0..1..1..1
..1..0..0..1....0..1..0..1....1..0..1..0....1..1..0..0....1..0..1..1
		

Formula

Empirical: a(n) = 6*a(n-1) -11*a(n-2) +7*a(n-3) -10*a(n-5) +13*a(n-6) -3*a(n-7) +27*a(n-8) -44*a(n-9) +13*a(n-10) +5*a(n-11) -8*a(n-12) +8*a(n-13) -3*a(n-14) +a(n-15)

A240786 Number of 5Xn 0..1 arrays with no element equal to fewer vertical neighbors than horizontal neighbors, with new values 0..1 introduced in row major order.

Original entry on oeis.org

16, 111, 459, 2167, 10150, 47920, 226532, 1071982, 5074441, 24028807, 113785341, 538857251, 2551907524, 12085420318, 57234822524, 271056496272, 1283688860005, 6079388685605, 28791225250367, 136351659911471, 645744522623364
Offset: 1

Views

Author

R. H. Hardin, Apr 12 2014

Keywords

Comments

Row 5 of A240783

Examples

			Some solutions for n=4
..0..1..0..1....0..1..0..1....0..1..1..0....0..0..1..0....0..1..1..0
..1..0..0..1....1..1..0..0....1..1..1..0....0..0..1..1....0..1..1..1
..0..0..1..1....1..0..1..0....1..1..1..0....0..0..1..1....1..0..1..1
..0..0..1..1....0..1..0..1....1..1..1..0....1..0..1..0....1..0..0..1
..0..1..0..1....1..0..1..0....0..1..1..0....1..0..1..0....1..0..0..1
		

Formula

Empirical: a(n) = 10*a(n-1) -35*a(n-2) +50*a(n-3) +23*a(n-4) -204*a(n-5) +114*a(n-6) +684*a(n-7) -1284*a(n-8) -309*a(n-9) +4412*a(n-10) -5481*a(n-11) -90*a(n-12) +4826*a(n-13) -3964*a(n-14) -3408*a(n-15) +3143*a(n-16) +3475*a(n-17) -3191*a(n-18) +7943*a(n-19) +2119*a(n-20) +1380*a(n-21) -8241*a(n-22) -8523*a(n-23) +3733*a(n-24) -79*a(n-25) +1925*a(n-26) +1275*a(n-27) +131*a(n-28) -147*a(n-29) -286*a(n-30) for n>34

A240787 Number of 6Xn 0..1 arrays with no element equal to fewer vertical neighbors than horizontal neighbors, with new values 0..1 introduced in row major order.

Original entry on oeis.org

32, 361, 2187, 15332, 106411, 746346, 5228820, 36701371, 257576121, 1808280738, 12694886397, 89128797051, 625760780302, 4393427783962, 30846025087421, 216568722650785, 1520521061879683, 10675526309057060, 74952512684267110
Offset: 1

Views

Author

R. H. Hardin, Apr 12 2014

Keywords

Comments

Row 6 of A240783

Examples

			Some solutions for n=4
..0..1..0..1....0..1..0..1....0..1..0..1....0..1..0..1....0..1..0..0
..0..0..1..0....1..0..1..1....0..1..0..1....0..1..0..1....0..1..0..0
..0..0..1..0....1..0..1..0....0..1..0..0....1..0..1..1....0..1..0..0
..0..0..1..1....0..1..1..0....1..1..0..0....0..1..1..1....0..1..0..1
..0..0..1..1....1..1..0..0....1..0..0..1....0..1..1..0....1..1..0..1
..1..0..1..0....1..1..0..0....1..0..1..0....0..1..1..0....1..1..0..1
		

Formula

Empirical recurrence of order 94 (see link above)

A240788 Number of 7 X n 0..1 arrays with no element equal to fewer vertical neighbors than horizontal neighbors, with new values 0..1 introduced in row major order.

Original entry on oeis.org

64, 1172, 10442, 108509, 1120383, 11677893, 121621207, 1269199948, 13241129190, 138189786444, 1442192128751, 15051954215634, 157096056362548, 1639615077341580, 17112720660101420, 178606392701182664
Offset: 1

Views

Author

R. H. Hardin, Apr 12 2014

Keywords

Comments

Row 7 of A240783.

Examples

			Some solutions for n=4:
..0..1..0..1....0..1..0..1....0..0..1..0....0..1..0..1....0..1..0..0
..0..1..0..1....0..1..1..0....0..0..1..1....1..0..0..0....1..1..0..0
..1..0..0..1....0..1..1..1....0..0..1..1....1..0..0..0....1..0..1..0
..0..0..1..1....1..0..1..1....1..0..0..1....0..1..0..1....1..0..1..0
..0..0..1..1....1..0..1..0....0..0..0..0....1..0..0..0....0..0..1..0
..0..0..1..1....0..1..1..0....0..0..0..0....1..0..0..0....0..1..0..0
..0..0..1..0....0..1..0..1....1..0..0..1....1..0..0..1....0..1..0..1
		

Crossrefs

Cf. A240783.
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