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.

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A302315 Number of 7Xn 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

64, 86, 336, 1090, 3915, 18990, 76642, 360898, 1695748, 9408402, 50431855, 270054791, 1483688723, 8638547369, 49555516908, 278416318505, 1587868618303, 9269491523649, 53654294707162, 306415770314870, 1762671922872075
Offset: 1

Views

Author

R. H. Hardin, Apr 05 2018

Keywords

Comments

Row 7 of A302309.

Examples

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

Links

Crossrefs

Cf. A302309.

A302303 Number of n X n 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

1, 3, 13, 66, 445, 5715, 76642, 2150420, 124691962, 17216491876
Offset: 1

Views

Author

R. H. Hardin, Apr 05 2018

Keywords

Comments

Diagonal of A302309.

Examples

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

Crossrefs

Cf. A302309.
Previous Showing 11-12 of 12 results.

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