A222766 Number of nX5 0..1 arrays with exactly floor(nX5/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order.
4, 18, 158, 2608, 19766, 333978, 2645385, 45830457, 370518626, 6504289924, 53224723750, 942396671062, 7774316625479, 138492173604656, 1149166452333809, 20564313304270211, 171388475477573948, 3077759439903425070
Offset: 1
Keywords
Examples
Some solutions for n=3 ..0..1..0..0..1....0..1..0..1..1....0..0..0..0..0....0..0..0..1..1 ..0..0..0..0..0....1..1..1..1..1....0..0..0..1..0....0..0..0..1..1 ..0..0..0..0..0....1..1..1..1..0....0..1..0..0..0....0..0..0..1..0
Links
- R. H. Hardin, Table of n, a(n) for n = 1..205
Comments