A303463 Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
1, 8, 170, 9110, 1243692, 427097893, 373571747330, 831176090437185, 4696687907289825363
Offset: 1
Keywords
Examples
Some solutions for n=5 ..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..1. .0..0..0..0..0 ..1..1..0..1..1. .0..1..1..0..1. .0..0..1..1..1. .1..0..1..1..0 ..0..1..0..1..1. .0..1..0..0..1. .1..0..1..1..1. .0..0..1..1..0 ..1..1..0..1..1. .0..0..0..1..1. .1..0..0..0..1. .1..0..0..1..0 ..0..1..0..1..0. .0..1..0..0..0. .0..0..1..0..0. .1..0..1..1..1
Crossrefs
Cf. A303469.
Comments