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 1-9 of 9 results.

A302665 Number of nX3 0..1 arrays with every element equal to 1, 2, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

1, 14, 43, 194, 691, 2802, 10660, 41839, 161878, 630842, 2449576, 9528949, 37035686, 144004769, 559817133, 2176500315, 8461548011, 32896646099, 127893433256, 497218644961, 1933060065053, 7515258095114, 29217439753668, 113590121120145
Offset: 1

Views

Author

R. H. Hardin, Apr 11 2018

Keywords

Comments

Column 3 of A302670.

Examples

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

Crossrefs

Cf. A302670.

Formula

Empirical: a(n) = 4*a(n-1) +4*a(n-2) -11*a(n-3) -27*a(n-4) -12*a(n-5) +85*a(n-6) +22*a(n-7) -22*a(n-8) -108*a(n-9) +72*a(n-10) -80*a(n-11) +120*a(n-12) +64*a(n-14)

A302666 Number of nX4 0..1 arrays with every element equal to 1, 2, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

2, 45, 164, 934, 4267, 21949, 106793, 529984, 2617548, 12938179, 63986777, 316244862, 1563877465, 7731246308, 38227036552, 188999363652, 934471931880, 4620268994057, 22843909984025, 112946725741085, 558440468796391
Offset: 1

Views

Author

R. H. Hardin, Apr 11 2018

Keywords

Comments

Column 4 of A302670.

Examples

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

Crossrefs

Cf. A302670.

Formula

Empirical: a(n) = 5*a(n-1) +12*a(n-2) -47*a(n-3) -101*a(n-4) +45*a(n-5) +381*a(n-6) +1292*a(n-7) +42*a(n-8) -5366*a(n-9) -7123*a(n-10) +6047*a(n-11) +22989*a(n-12) +15537*a(n-13) -22434*a(n-14) -51326*a(n-15) -29224*a(n-16) +38509*a(n-17) +82591*a(n-18) +44309*a(n-19) -44268*a(n-20) -87403*a(n-21) -42575*a(n-22) +28053*a(n-23) +52051*a(n-24) +24821*a(n-25) -7290*a(n-26) -13614*a(n-27) -6288*a(n-28) +190*a(n-29) +1280*a(n-30) +312*a(n-31) +20*a(n-32) for n>35

A302667 Number of nX5 0..1 arrays with every element equal to 1, 2, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

3, 146, 760, 6110, 42367, 316977, 2320879, 17037458, 125456575, 920577056, 6771994976, 49750520267, 365694010435, 2687564829667, 19752736970617, 145173898526499, 1066965083553746, 7841771608569736, 57633622628200420
Offset: 1

Views

Author

R. H. Hardin, Apr 11 2018

Keywords

Comments

Column 5 of A302670.

Examples

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

Crossrefs

Cf. A302670.

A302668 Number of nX6 0..1 arrays with every element equal to 1, 2, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

5, 537, 3425, 38736, 352174, 3640304, 35549458, 353912413, 3503182605, 34733392242, 344383586201, 3413092993197, 33838324669263, 335406192214163, 3325046165086088, 32959991923444290, 326735142581592322
Offset: 1

Views

Author

R. H. Hardin, Apr 11 2018

Keywords

Comments

Column 6 of A302670.

Examples

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

Crossrefs

Cf. A302670.

A302669 Number of nX7 0..1 arrays with every element equal to 1, 2, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

8, 1934, 15569, 251254, 3204956, 46360666, 637088915, 8880747825, 123521424862, 1717557375519, 23910961429217, 332517383714540, 4627380566545690, 64369973050145418, 895641924918067374, 12460311385203779872
Offset: 1

Views

Author

R. H. Hardin, Apr 11 2018

Keywords

Comments

Column 7 of A302670.

Examples

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

Crossrefs

Cf. A302670.

A302671 Number of 5Xn 0..1 arrays with every element equal to 1, 2, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

0, 111, 691, 4267, 42367, 352174, 3204956, 28324200, 248482982, 2223806395, 19612845211, 174147277424, 1545345042448, 13690754212668, 121518036637399, 1077456338230779, 9556752221812425, 84773605649902772, 751847387040101232
Offset: 1

Views

Author

R. H. Hardin, Apr 11 2018

Keywords

Comments

Row 5 of A302670.

Examples

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

Crossrefs

Cf. A302670.

A302672 Number of 6Xn 0..1 arrays with every element equal to 1, 2, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

0, 361, 2802, 21949, 316977, 3640304, 46360666, 582115385, 7102982284, 89673817840, 1109953847172, 13832059626512, 172620198739923, 2146228140110545, 26771858593225105, 333424179617097795
Offset: 1

Views

Author

R. H. Hardin, Apr 11 2018

Keywords

Comments

Row 6 of A302670.

Examples

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

Crossrefs

Cf. A302670.

A302673 Number of 7Xn 0..1 arrays with every element equal to 1, 2, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

0, 1172, 10660, 106793, 2320879, 35549458, 637088915, 11181864782, 188509564214, 3339792969770, 57406756149300, 997632805281762, 17363763785624592, 300575131517843683, 5229363965628293685, 90736499929821199253
Offset: 1

Views

Author

R. H. Hardin, Apr 11 2018

Keywords

Comments

Row 7 of A302670.

Examples

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

Crossrefs

Cf. A302670.

A302664 Number of n X n 0..1 arrays with every element equal to 1, 2, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

0, 3, 43, 934, 42367, 3640304, 637088915, 219692176894, 138670742999582
Offset: 1

Views

Author

R. H. Hardin, Apr 11 2018

Keywords

Comments

Diagonal of A302670.

Examples

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

Crossrefs

Cf. A302670.
Showing 1-9 of 9 results.