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 12 results. Next

A220381 Majority value maps: number of n X 3 binary arrays indicating the locations of corresponding elements equal to at least half of their horizontal and antidiagonal neighbors in a random 0..1 n X 3 array.

Original entry on oeis.org

4, 25, 136, 753, 4160, 22989, 127037, 702009, 3879313, 21437148, 118462034, 654623158, 3617458391, 19990134860, 110465815644, 610435923087, 3373279000591, 18640795512630, 103009344107857, 569231338133692
Offset: 1

Views

Author

R. H. Hardin, Dec 13 2012

Keywords

Comments

Column 3 of A220386.

Examples

			Some solutions for n=3:
..0..0..1....0..0..1....0..0..1....1..1..1....0..0..1....1..1..1....1..1..0
..0..1..0....0..1..1....1..1..0....1..1..1....0..1..1....1..0..0....1..0..0
..1..0..0....1..1..0....0..0..1....1..0..0....0..1..1....0..0..1....0..0..0
		

Crossrefs

Cf. A220386.

Formula

Empirical: a(n) = 4*a(n-1) + 8*a(n-2) + 3*a(n-3) - 3*a(n-4) - 2*a(n-5).
Empirical g.f.: x*(4 + 9*x + 4*x^2 - 3*x^3 - 3*x^4) / (1 - 4*x - 8*x^2 - 3*x^3 + 3*x^4 + 2*x^5). - Colin Barker, Jul 31 2018

A220382 Majority value maps: number of nX4 binary arrays indicating the locations of corresponding elements equal to at least half of their horizontal and antidiagonal neighbors in a random 0..1 nX4 array.

Original entry on oeis.org

7, 79, 757, 7462, 73066, 715412, 7003040, 68557435, 671141189, 6570141318, 64318370539, 629644495493, 6163902725507, 60341505579868, 590712971700130, 5782782703158232, 56610532354660692, 554188621256117979
Offset: 1

Views

Author

R. H. Hardin Dec 13 2012

Keywords

Comments

Column 4 of A220386

Examples

			Some solutions for n=3
..0..1..1..1....0..1..1..1....1..1..1..0....1..0..0..0....0..1..0..1
..1..1..1..0....1..0..0..0....1..1..0..1....1..1..0..1....1..1..1..1
..1..1..0..0....1..0..0..0....1..0..1..0....1..0..1..1....1..0..1..0
		

Formula

Empirical: a(n) = 7*a(n-1) +33*a(n-2) -35*a(n-3) -198*a(n-4) -52*a(n-5) +60*a(n-6) -248*a(n-7) +327*a(n-8) +2885*a(n-9) +3686*a(n-10) -391*a(n-11) -2646*a(n-12) +1576*a(n-13) +5693*a(n-14) +4779*a(n-15) +1858*a(n-16) +790*a(n-17) +571*a(n-18) +145*a(n-19) -48*a(n-20) -28*a(n-21) -4*a(n-22) for n>23

A220383 Majority value maps: number of nX5 binary arrays indicating the locations of corresponding elements equal to at least half of their horizontal and antidiagonal neighbors in a random 0..1 nX5 array.

Original entry on oeis.org

12, 278, 5114, 96772, 1829169, 34521416, 651568437, 12297040231, 232084431547, 4380156648582, 82667261274110, 1560189486600826, 29445650681573390, 555731427515570889, 10488388353407095343, 197948657733286598661
Offset: 1

Views

Author

R. H. Hardin Dec 13 2012

Keywords

Comments

Column 5 of A220386

Examples

			Some solutions for n=3
..1..1..0..0..1....1..1..0..0..1....1..0..1..1..0....0..1..1..1..1
..1..0..0..0..1....1..0..0..1..1....1..1..1..1..0....1..1..0..1..1
..0..0..1..1..1....1..1..1..0..0....1..0..1..1..1....0..0..0..1..1
		

A220385 Majority value maps: number of nX7 binary arrays indicating the locations of corresponding elements equal to at least half of their horizontal and antidiagonal neighbors in a random 0..1 nX7 array.

Original entry on oeis.org

37, 3362, 211944, 14300020, 953142266, 63512364783, 4230913273170, 281832304026762, 18773103173607539, 1250484272007085681, 83294998840686500460, 5548289757274042292269, 369572057472278683296258
Offset: 1

Views

Author

R. H. Hardin Dec 13 2012

Keywords

Comments

Column 7 of A220386

Examples

			Some solutions for n=3
..0..0..1..1..1..0..1....0..1..1..1..0..1..1....0..0..0..0..1..1..1
..1..0..1..1..1..1..0....1..1..1..1..1..0..1....1..1..0..1..1..0..1
..1..1..0..1..1..1..1....0..0..0..1..1..1..1....1..1..1..0..1..1..1
		

A220387 Majority value maps: number of 2Xn binary arrays indicating the locations of corresponding elements equal to at least half of their horizontal and antidiagonal neighbors in a random 0..1 2Xn array.

Original entry on oeis.org

1, 7, 25, 79, 278, 966, 3362, 11642, 40375, 140102, 486191, 1686966, 5853300, 20309556, 70470311, 244518242, 848429087, 2943877082, 10214660764, 35442822154, 122979474647, 426714063696, 1480612045993, 5137426278616
Offset: 1

Views

Author

R. H. Hardin Dec 13 2012

Keywords

Comments

Row 2 of A220386

Examples

			Some solutions for n=3
..1..0..0....1..1..1....0..0..0....0..0..1....0..0..1....0..0..1....1..1..0
..0..0..1....1..0..0....1..1..1....0..0..0....0..1..1....1..1..1....1..1..1
		

Formula

Empirical: a(n) = 3*a(n-1) +4*a(n-3) +7*a(n-4) -7*a(n-6) -19*a(n-7) -21*a(n-8) -33*a(n-9) -14*a(n-10) +a(n-11) +6*a(n-12) +45*a(n-13) +27*a(n-14) +72*a(n-15) -a(n-16) +6*a(n-17) -32*a(n-18) -16*a(n-19) -4*a(n-20) +4*a(n-22)

A220388 Majority value maps: number of 3Xn binary arrays indicating the locations of corresponding elements equal to at least half of their horizontal and antidiagonal neighbors in a random 0..1 3Xn array.

Original entry on oeis.org

1, 21, 136, 757, 5114, 33247, 211944, 1358599, 8710809, 55837516, 357929465, 2294335738, 14706528192, 94267737477, 604248583206, 3873181842138, 24826757202429, 159137319721129, 1020056076249840, 6538468564699587
Offset: 1

Views

Author

R. H. Hardin Dec 13 2012

Keywords

Comments

Row 3 of A220386

Examples

			Some solutions for n=3
..1..0..1....0..0..0....0..0..1....1..0..1....0..0..0....0..0..1....1..1..1
..1..1..0....1..1..1....1..1..0....1..1..1....1..1..0....0..1..0....0..1..0
..0..0..0....1..0..0....1..0..0....1..1..1....1..0..0....1..1..1....1..1..1
		

A220389 Majority value maps: number of 4 X n binary arrays indicating the locations of corresponding elements equal to at least half of their horizontal and antidiagonal neighbors in a random 0..1 4 X n array.

Original entry on oeis.org

1, 65, 753, 7462, 96772, 1191846, 14300020, 173237008, 2099827058, 25429907185, 308015025891, 3730748101061, 45187679794622, 547324309089088, 6629322362588949, 80295917106362511, 972563175651344849
Offset: 1

Views

Author

R. H. Hardin Dec 13 2012

Keywords

Comments

Row 4 of A220386.

Examples

			Some solutions for n=3
..0..0..1....1..0..0....1..1..1....0..1..1....0..1..1....1..1..1....0..1..1
..1..1..0....0..1..1....0..1..1....1..1..1....1..0..0....0..1..0....1..1..0
..0..0..1....1..1..1....1..0..0....1..0..1....0..0..0....1..1..1....1..0..1
..1..0..0....1..0..1....1..1..1....1..1..1....1..1..1....0..0..0....1..1..1
		

Crossrefs

Cf. A220386.

A220380 Majority value maps: number of n X n binary arrays indicating the locations of corresponding elements equal to at least half of their horizontal and antidiagonal neighbors in a random 0..1 n X n array.

Original entry on oeis.org

1, 7, 136, 7462, 1829169, 1509240923, 4230913273170
Offset: 1

Views

Author

R. H. Hardin Dec 13 2012

Keywords

Comments

Diagonal of A220386

Examples

			Some solutions for n=3
..1..0..0....1..1..1....1..1..1....0..0..1....1..0..0....1..0..1....1..1..1
..0..0..1....0..1..1....0..1..1....1..0..1....0..0..0....1..1..0....1..0..0
..1..1..0....1..0..1....0..0..0....1..1..1....1..1..1....1..1..1....1..1..1
		

A220384 Majority value maps: number of nX6 binary arrays indicating the locations of corresponding elements equal to at least half of their horizontal and antidiagonal neighbors in a random 0..1 nX6 array.

Original entry on oeis.org

21, 966, 33247, 1191846, 42415575, 1509240923, 53692543412, 1910141303899, 67952729355483, 2417392485157080, 85997620546017880, 3059323896869473363, 108833942883495398598, 3871713631294308702400
Offset: 1

Views

Author

R. H. Hardin Dec 13 2012

Keywords

Comments

Column 6 of A220386

Examples

			Some solutions for n=3
..0..1..1..1..1..1....0..1..1..0..0..1....1..0..0..1..1..1....1..0..1..0..0..1
..1..1..1..1..0..1....1..0..1..1..1..1....0..1..1..0..1..1....1..1..0..0..0..1
..1..0..0..0..1..1....0..1..1..0..0..1....1..1..0..1..0..0....0..0..0..0..1..0
		

A220390 Majority value maps: number of 5Xn binary arrays indicating the locations of corresponding elements equal to at least half of their horizontal and antidiagonal neighbors in a random 0..1 5Xn array.

Original entry on oeis.org

1, 200, 4160, 73066, 1829169, 42415575, 953142266, 21739995768, 495718486488, 11288328674868, 257120991237495, 5856859209332488
Offset: 1

Views

Author

R. H. Hardin Dec 13 2012

Keywords

Comments

Row 5 of A220386

Examples

			Some solutions for n=3
..1..1..1....0..0..0....1..1..0....0..0..1....0..0..1....0..1..1....1..0..0
..0..0..0....0..0..1....1..1..0....1..1..1....0..0..1....1..0..0....0..0..0
..0..0..1....1..1..0....1..1..1....0..0..0....1..1..1....0..1..1....1..0..1
..1..0..1....0..0..1....1..0..0....0..1..1....0..0..1....1..1..1....1..1..1
..1..1..0....0..1..1....1..1..1....1..1..0....1..1..1....0..1..1....1..0..0
		
Showing 1-10 of 12 results. Next