A289649 Number of n X 6 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 two less than the number of 0's adjacent to some 1.
1, 642, 31271, 1756800, 98170524, 5675111511, 332113863074, 19700973655406, 1179502836506537, 71173612294297941, 4321709778773574262, 263787324115374465023, 16170909984602074224282, 994955226590688056771461
Offset: 1
Keywords
Examples
Some solutions for n=3 ..1..0..0..1..1..0. .1..0..0..0..0..1. .1..1..0..1..1..0. .1..0..0..1..0..0 ..0..1..1..0..1..0. .1..0..1..1..0..1. .1..0..0..0..0..1. .0..0..1..0..0..1 ..0..1..0..0..1..0. .1..0..0..0..0..1. .0..1..0..0..1..1. .0..1..1..1..1..0
Links
- R. H. Hardin, Table of n, a(n) for n = 1..53
Crossrefs
Cf. A289651.
Comments