A303622 Number of nX6 0..1 arrays with every element equal to 0, 2, 3, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
1, 168, 1283, 19467, 350410, 6446485, 122517773, 2348299355, 45211204167, 872116776878, 16840012914187, 325325036804019, 6286301532328358, 121485138860397708, 2347880112852680240, 45377538348278054960
Offset: 1
Keywords
Examples
Some solutions for n=5 ..0..0..0..0..0..0. .0..0..0..0..0..0. .0..0..0..0..1..1. .0..0..1..1..0..0 ..0..0..0..1..0..0. .0..0..1..1..0..0. .0..0..0..0..1..1. .0..0..1..1..0..0 ..0..1..0..0..0..0. .0..0..1..1..0..0. .0..0..0..1..1..1. .1..0..0..1..0..0 ..0..0..0..1..0..1. .1..0..0..1..1..1. .0..0..0..0..1..0. .0..0..0..1..1..1 ..1..0..0..1..0..1. .1..0..0..1..1..0. .1..0..0..0..1..0. .0..0..0..1..1..1
Links
- R. H. Hardin, Table of n, a(n) for n = 1..210
Crossrefs
Cf. A303624.
Comments