A284219 Number of n X 5 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.
10, 143, 3214, 85887, 2417194, 69938626, 2058141264, 61304713234, 1842647045686, 55774782577154, 1697707702343462, 51912416104327610, 1593418341131944098, 49066300496202571019, 1515066051729449019246, 46893719654238123775675
Offset: 1
Keywords
Examples
Some solutions for n=4 ..0..1..0..1..0. .0..1..1..0..1. .0..0..0..1..0. .0..0..1..0..1 ..1..0..0..1..1. .0..1..1..0..0. .1..1..1..1..0. .1..0..0..1..0 ..1..0..1..1..0. .1..0..1..1..0. .0..0..1..1..1. .1..0..0..1..0 ..1..0..0..1..1. .1..0..0..0..1. .1..0..0..0..0. .1..1..0..1..1
Links
- R. H. Hardin, Table of n, a(n) for n = 1..210
Crossrefs
Cf. A284222.
Comments