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 1-6 of 6 results.

A267714 Number of nX3 0..1 arrays with every repeated value in every row and column greater than the previous repeated value.

Original entry on oeis.org

6, 36, 102, 270, 546, 1080, 1866, 3186, 5010, 7830, 11550, 17004, 23934, 33726, 45786, 62364, 82254, 109008, 140406, 181890, 229674, 291852, 362346, 452862, 554106, 682578, 824622, 1002960, 1198182, 1440930, 1704378, 2029080, 2378838, 2806428
Offset: 1

Views

Author

R. H. Hardin, Jan 19 2016

Keywords

Comments

Column 3 of A267719.

Examples

			Some solutions for n=5
..0..1..1....0..1..1....0..0..1....1..1..0....1..0..0....1..0..0....1..0..0
..1..0..0....1..0..0....0..1..0....0..0..1....1..0..1....0..1..1....0..1..1
..0..1..1....1..1..0....1..0..1....0..1..0....0..1..1....1..0..0....1..0..1
..1..0..1....0..0..1....0..1..1....1..0..1....1..1..0....0..1..0....0..1..0
..0..1..0....1..1..0....1..1..0....1..1..0....0..0..1....0..0..1....0..1..1
		

Crossrefs

Cf. A267719.

Formula

Empirical: a(n) = 2*a(n-1) +4*a(n-2) -10*a(n-3) -5*a(n-4) +20*a(n-5) -20*a(n-7) +5*a(n-8) +10*a(n-9) -4*a(n-10) -2*a(n-11) +a(n-12)

A267715 Number of nX4 0..1 arrays with every repeated value in every row and column greater than the previous repeated value.

Original entry on oeis.org

9, 81, 270, 872, 1915, 4266, 7879, 14632, 24440, 40816, 63714, 99260, 147469, 218666, 312723, 446708, 619670, 859376, 1162558, 1573616, 2084223, 2764010, 3595063, 4684320, 5997316, 7694800, 9715586, 12296260, 15334641, 19171946, 23645587
Offset: 1

Views

Author

R. H. Hardin, Jan 19 2016

Keywords

Comments

Column 4 of A267719.

Examples

			Some solutions for n=5
..0..1..0..1....0..0..1..0....1..0..1..1....0..1..1..0....0..1..0..0
..1..0..1..0....0..1..0..0....0..1..1..0....1..0..0..1....1..0..1..0
..1..0..1..0....1..1..0..1....1..1..0..1....0..0..1..1....0..0..1..1
..0..1..0..1....1..0..1..0....0..0..1..0....0..1..1..0....1..1..0..1
..1..0..1..1....0..1..0..1....0..1..0..0....1..0..0..1....1..0..1..0
		

Crossrefs

Cf. A267719.

Formula

Empirical: a(n) = 2*a(n-1) +6*a(n-2) -14*a(n-3) -14*a(n-4) +42*a(n-5) +14*a(n-6) -70*a(n-7) +70*a(n-9) -14*a(n-10) -42*a(n-11) +14*a(n-12) +14*a(n-13) -6*a(n-14) -2*a(n-15) +a(n-16) for n>18

A267716 Number of nX5 0..1 arrays with every repeated value in every row and column greater than the previous repeated value.

Original entry on oeis.org

12, 144, 546, 1915, 4444, 10489, 20226, 39485, 68430, 119560, 192852, 313293, 479670, 740131, 1089072, 1617072, 2306226, 3323353, 4621390, 6500801, 8852780, 12205815, 16330614, 22134297, 29166650, 38947360, 50640656, 66733431, 85743710
Offset: 1

Views

Author

R. H. Hardin, Jan 19 2016

Keywords

Comments

Column 5 of A267719.

Examples

			Some solutions for n=5
..1..0..1..0..1....0..1..1..0..1....0..1..0..1..0....1..1..0..1..0
..0..1..0..1..0....1..0..0..1..1....0..0..1..0..1....1..0..1..0..1
..1..0..1..0..1....1..0..1..0..0....1..0..1..1..0....0..1..0..1..0
..0..1..0..1..1....0..1..0..0..1....0..1..0..0..1....1..0..0..1..1
..1..0..1..0..0....1..0..1..1..0....1..0..1..1..0....0..1..1..0..1
		

Crossrefs

Cf. A267719.

Formula

Empirical: a(n) = 2*a(n-1) +8*a(n-2) -18*a(n-3) -27*a(n-4) +72*a(n-5) +48*a(n-6) -168*a(n-7) -42*a(n-8) +252*a(n-9) -252*a(n-11) +42*a(n-12) +168*a(n-13) -48*a(n-14) -72*a(n-15) +27*a(n-16) +18*a(n-17) -8*a(n-18) -2*a(n-19) +a(n-20) for n>22

A267717 Number of nX6 0..1 arrays with every repeated value in every row and column greater than the previous repeated value.

Original entry on oeis.org

16, 256, 1080, 4266, 10489, 26906, 54887, 114392, 209470, 385962, 656670, 1114828, 1796644, 2877378, 4446790, 6818296, 10190753, 15108240, 21972963, 31714408, 45087635, 63668368, 88787667, 123106970, 168846792, 230489608, 311557126
Offset: 1

Views

Author

R. H. Hardin, Jan 19 2016

Keywords

Comments

Column 6 of A267719.

Examples

			Some solutions for n=5
..0..1..0..1..0..0....1..1..0..1..0..1....1..0..1..0..1..1....0..1..0..0..1..0
..0..1..0..0..1..0....1..0..1..0..1..1....0..1..0..1..0..0....0..0..1..1..0..1
..1..0..1..1..0..1....0..1..0..0..1..0....1..0..1..0..1..0....1..1..0..1..0..1
..0..1..0..0..1..0....1..0..1..1..0..1....0..1..0..0..1..1....1..0..1..0..1..0
..1..0..1..0..1..1....0..0..1..0..1..0....0..1..0..1..0..0....0..0..1..1..0..1
		

Crossrefs

Cf. A267719.

Formula

Empirical: a(n) = 2*a(n-1) +10*a(n-2) -22*a(n-3) -44*a(n-4) +110*a(n-5) +110*a(n-6) -330*a(n-7) -165*a(n-8) +660*a(n-9) +132*a(n-10) -924*a(n-11) +924*a(n-13) -132*a(n-14) -660*a(n-15) +165*a(n-16) +330*a(n-17) -110*a(n-18) -110*a(n-19) +44*a(n-20) +22*a(n-21) -10*a(n-22) -2*a(n-23) +a(n-24) for n>27

A267718 Number of nX7 0..1 arrays with every repeated value in every row and column greater than the previous repeated value.

Original entry on oeis.org

20, 400, 1866, 7879, 20226, 54887, 116036, 255009, 481390, 932245, 1627470, 2893983, 4765598, 7967260, 12535320, 20000374, 30337594, 46665892, 68699820, 102616722, 147369478, 214889742, 302259706, 431988823, 597033836, 838908027
Offset: 1

Views

Author

R. H. Hardin, Jan 19 2016

Keywords

Comments

Column 7 of A267719.

Examples

			Some solutions for n=5
..0..0..1..0..1..0..1....0..1..0..1..0..1..1....1..0..1..0..1..0..0
..1..1..0..1..0..1..0....1..1..0..1..0..1..0....0..1..0..1..0..1..0
..1..0..1..0..1..0..1....0..0..1..0..1..0..1....1..0..1..0..1..0..1
..0..0..1..1..0..1..0....0..1..0..1..0..1..0....0..1..0..0..1..1..0
..1..1..0..1..0..1..0....1..0..1..0..1..0..0....0..1..0..1..0..1..1
		

Crossrefs

Cf. A267719.

Formula

Empirical: a(n) = 2*a(n-1) +12*a(n-2) -26*a(n-3) -65*a(n-4) +156*a(n-5) +208*a(n-6) -572*a(n-7) -429*a(n-8) +1430*a(n-9) +572*a(n-10) -2574*a(n-11) -429*a(n-12) +3432*a(n-13) -3432*a(n-15) +429*a(n-16) +2574*a(n-17) -572*a(n-18) -1430*a(n-19) +429*a(n-20) +572*a(n-21) -208*a(n-22) -156*a(n-23) +65*a(n-24) +26*a(n-25) -12*a(n-26) -2*a(n-27) +a(n-28) for n>30

A267713 Number of n X n 0..1 arrays with every repeated value in every row and column greater than the previous repeated value.

Original entry on oeis.org

2, 16, 102, 872, 4444, 26906, 116036, 592110, 2411426, 11438402, 45729992, 209204918, 830949994, 3719941006, 14733123252, 64989888570
Offset: 1

Views

Author

R. H. Hardin, Jan 19 2016

Keywords

Comments

Diagonal of A267719.

Examples

			Some solutions for n=5
..1..0..1..1..0....1..0..1..1..0....1..0..1..0..1....0..1..1..0..1
..0..1..0..0..1....0..1..0..0..1....0..1..0..1..0....1..0..0..1..1
..0..0..1..1..0....1..0..1..1..0....1..0..1..0..1....0..1..0..1..0
..1..0..0..1..0....1..0..0..1..1....1..0..1..0..0....1..0..1..0..1
..0..1..0..0..1....0..1..0..0..1....0..1..0..1..0....1..1..0..1..0
		

Crossrefs

Cf. A267719.
Showing 1-6 of 6 results.