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 1-8 of 8 results.

A265451 Number of n X 1 0..n+1-2 arrays with each element differing from its horizontal and vertical neighbors by one or two.

Original entry on oeis.org

1, 1, 2, 12, 66, 360, 1864, 9358, 45642, 217590, 1017626, 4684896, 21284488, 95624666, 425523864, 1878025074, 8229470812, 35836393568, 155196577484, 668832795812, 2869861291134, 12266161148622, 52243167132940, 221803857150698, 938974990229088, 3964558585350392
Offset: 0

Views

Author

R. H. Hardin, Dec 09 2015

Keywords

Examples

			Some solutions for n=4
..3....3....1....2....2....0....3....0....0....1....2....2....1....0....0....3
..2....1....2....0....1....1....1....1....2....3....3....0....0....1....1....2
..3....2....1....2....0....3....0....0....1....2....2....1....1....3....2....0
..2....1....3....1....1....2....1....1....0....1....0....2....2....1....0....2

Links

Crossrefs

Column 1 of A265458.
Cf. A102699.

Extensions

a(0)=1 prepended by Alois P. Heinz, Oct 25 2022

A265452 Number of nX2 0..n+2-2 arrays with each element differing from its horizontal and vertical neighbors by one or two.

Original entry on oeis.org

2, 18, 250, 3358, 42282, 502154, 5710302, 62782966, 672520310, 7056533978, 72819524370, 741279145398, 7460955607878, 74381377429158, 735539563061590, 7222916531541006, 70499118369836786, 684459097597365542
Offset: 1

Views

Author

R. H. Hardin, Dec 09 2015

Keywords

Comments

Column 2 of A265458.

Examples

			Some solutions for n=4
..1..2....3..1....1..0....4..3....3..2....2..3....2..0....1..3....4..2....3..2
..2..3....4..2....0..2....2..1....2..1....3..4....0..1....2..4....3..1....1..0
..1..2....2..1....2..3....1..3....1..2....4..2....1..2....1..2....1..3....0..1
..3..4....1..3....3..1....0..1....3..4....2..1....2..3....2..1....3..1....2..3

Links

Crossrefs

Cf. A265458.

A265453 Number of nX3 0..n+3-2 arrays with each element differing from its horizontal and vertical neighbors by one or two.

Original entry on oeis.org

12, 250, 7422, 216466, 6056182, 161435322, 4148236142, 103476193518, 2523840866186, 60444664118334, 1426665304637082, 33267668122964462, 768000220549574982, 17579038730691587714, 399459371232734669014
Offset: 1

Views

Author

R. H. Hardin, Dec 09 2015

Keywords

Comments

Column 3 of A265458.

Examples

			Some solutions for n=3
..3..2..0....1..2..0....4..2..0....1..3..1....0..2..3....2..3..2....3..1..0
..1..0..2....0..1..2....2..3..1....2..4..3....2..0..1....0..2..3....2..3..1
..2..1..3....1..2..4....3..1..0....4..3..4....3..2..3....1..0..1....3..4..2

Links

Crossrefs

Cf. A265458.

A265454 Number of nX4 0..n+4-2 arrays with each element differing from its horizontal and vertical neighbors by one or two.

Original entry on oeis.org

66, 3358, 216466, 13943772, 871209026, 52509347006, 3073046007824, 175659478218938, 9853875472731614, 544420779803461484, 29705625866016751450, 1604088383366277766514, 85864081342833064010380
Offset: 1

Views

Author

R. H. Hardin, Dec 09 2015

Keywords

Comments

Column 4 of A265458.

Examples

			Some solutions for n=2
..1..3..2..4....2..0..1..3....4..2..1..2....3..1..2..1....2..3..2..4
..2..1..0..2....0..2..3..1....3..4..3..4....4..3..1..3....0..2..4..3

Links

Crossrefs

Cf. A265458.

A265455 Number of nX5 0..n+5-2 arrays with each element differing from its horizontal and vertical neighbors by one or two.

Original entry on oeis.org

360, 42282, 6056182, 871209026, 122895678174, 16879041018070, 2268041942592142, 299048113399679982, 38840546858752416798, 4980829532639930253638, 632088592086702141594594
Offset: 1

Views

Author

R. H. Hardin, Dec 09 2015

Keywords

Comments

Column 5 of A265458.

Examples

			Some solutions for n=2
..0..1..3..2..4....2..1..3..1..3....0..1..3..1..3....2..3..1..2..1
..1..2..1..3..2....3..2..1..3..1....2..0..2..3..2....4..2..0..1..2

Links

Crossrefs

Cf. A265458.

A265456 Number of nX6 0..n+6-2 arrays with each element differing from its horizontal and vertical neighbors by one or two.

Original entry on oeis.org

1864, 502154, 161435322, 52509347006, 16879041018070, 5327856426356284, 1653688201339124766, 505814947757578021828, 152811753980421954365094, 45684812294133949143632978, 13536944058009909827807440148
Offset: 1

Views

Author

R. H. Hardin, Dec 09 2015

Keywords

Comments

Column 6 of A265458.

Examples

			Some solutions for n=1
..2..3..2..1..3..5....4..2..3..2..1..3....1..2..0..1..3..1....4..3..4..2..4..2

Links

Crossrefs

Cf. A265458.

A265457 Number of nX7 0..n+7-2 arrays with each element differing from its horizontal and vertical neighbors by one or two.

Original entry on oeis.org

9358, 5710302, 4148236142, 3073046007824, 2268041942592142, 1653688201339124766, 1191337567990711362900, 848423104474986244064166, 598271406157938091938371830, 418189967455232632823299204488
Offset: 1

Views

Author

R. H. Hardin, Dec 09 2015

Keywords

Comments

Column 7 of A265458.

Examples

			Some solutions for n=1
..0..2..3..1..2..3..1....3..5..3..4..3..2..4....3..4..2..4..2..1..0

Links

Crossrefs

Cf. A265458.

A265450 Number of n X n 0..2n-2 arrays with each element differing from its horizontal and vertical neighbors by one or two.

Original entry on oeis.org

1, 18, 7422, 13943772, 122895678174, 5327856426356284, 1191337567990711362900, 1410907091881274891065515756
Offset: 1

Views

Author

R. H. Hardin, Dec 09 2015

Keywords

Comments

Diagonal of A265458.

Examples

			Some solutions for n=3
..2..0..2....1..3..2....3..2..4....0..1..3....0..1..3....2..0..2....2..0..1
..1..2..1....3..1..3....2..0..2....1..3..1....1..0..1....0..2..3....3..1..3
..2..1..0....1..0..1....4..2..1....2..4..3....0..1..3....1..3..1....1..0..1

Crossrefs

Cf. A265458.
Showing 1-8 of 8 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.