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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A297768 Number of 7Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2, 3 or 4 neighboring 1s.

Original entry on oeis.org

1, 69, 28565, 720785, 18733087, 1504842706, 108229776807, 5471123716394, 286817881089193, 17003133505644511, 992034690844277806, 55560988268455263857, 3131312608795918940918, 178941939002152696425045
Offset: 1

Views

Author

R. H. Hardin, Jan 05 2018

Keywords

Comments

Row 7 of A297762.

Examples

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

Links

Crossrefs

Cf. A297762.

A297756 Number of n X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2, 3 or 4 neighboring 1's.

Original entry on oeis.org

1, 2, 52, 1181, 109228, 59707529, 108229776807, 486950815286291, 7321785704464787533, 424569942925543143564742
Offset: 1

Views

Author

R. H. Hardin, Jan 05 2018

Keywords

Comments

Diagonal of A297762.

Examples

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

Crossrefs

Cf. A297762.
Previous Showing 11-12 of 12 results.

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

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