A302725 Number of n X 5 0..1 arrays with every element equal to 1, 2, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
3, 27, 74, 287, 1307, 4491, 17828, 80293, 304958, 1254491, 5534905, 22489246, 94732609, 413955598, 1740468900, 7436093945, 32346857005, 138259463124, 595133929409, 2583681234015, 11128738383880, 48080514602454
Offset: 1
Keywords
Examples
Some solutions for n=5 ..0..0..1..0..0. .0..1..0..0..0. .0..0..1..0..1. .0..0..0..0..1 ..0..1..1..1..1. .0..0..1..1..1. .0..1..1..1..0. .0..1..0..1..1 ..1..0..1..0..0. .0..1..1..1..1. .0..0..0..0..1. .1..1..1..1..1 ..0..1..1..1..1. .1..1..1..0..1. .1..0..0..0..0. .1..0..1..0..0 ..0..0..1..0..0. .1..0..0..1..0. .0..1..1..1..0. .0..1..0..1..1
Links
- R. H. Hardin, Table of n, a(n) for n = 1..210
Crossrefs
Cf. A302728.
Comments