A298136 Number of n X 5 0..1 arrays with every element equal to 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.
0, 11, 0, 20, 88, 242, 627, 2604, 8137, 28727, 101137, 350450, 1221711, 4290711, 14968081, 52427734, 183691236, 643194452, 2252416158, 7891461835, 27639419217, 96818359023, 339160988868, 1188063187221, 4161765906348, 14578893452507
Offset: 1
Keywords
Examples
Some solutions for n=7 ..0..0..1..0..0. .0..0..0..0..0. .0..0..1..0..0. .0..0..1..1..1 ..1..0..1..1..0. .0..1..1..1..0. .0..1..0..1..0. .0..1..0..0..1 ..1..1..0..0..1. .1..0..0..1..1. .0..1..0..1..0. .0..1..1..1..0 ..1..0..1..1..0. .1..0..1..0..1. .1..0..0..1..0. .1..0..0..0..1 ..1..0..1..0..0. .1..0..1..0..1. .1..0..0..0..1. .1..0..1..1..1 ..1..0..1..0..1. .1..0..1..0..1. .0..1..0..1..0. .0..1..1..0..1 ..1..1..0..1..1. .1..1..0..1..1. .0..0..1..0..0. .0..0..0..0..0
Links
- R. H. Hardin, Table of n, a(n) for n = 1..210
Crossrefs
Cf. A298139.
Comments