A302224 -id:A302224 - cp's OEIS frontend

A302230 Number of 7Xn 0..1 arrays with every element equal to 1, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

0, 1172, 9819, 105585, 2043848, 32181643, 553097760, 9458629708, 156841573045, 2693021176397, 45330956689241, 767899918791607, 13034126338915675, 220281663367352676, 3736908224173762193, 63270418755935977976

Offset: 1

R. H. Hardin, Apr 03 2018

nonn

Row 7 of A302224.

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

R. H. Hardin, Table of n, a(n) for n = 1..210

Cf. A302224.

A302218 Number of n X n 0..1 arrays with every element equal to 1, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Original entry on oeis.org

0, 3, 43, 934, 40395, 3420704, 553097760, 177191137344, 102914156897887, 122108799039662692

Offset: 1

R. H. Hardin, Apr 03 2018

nonn

Diagonal of A302224.

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

Cf. A302224.

cp's OEIS Frontend

A302230 Number of 7Xn 0..1 arrays with every element equal to 1, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

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