A240653 Number of nX5 0..1 arrays with no element equal to exactly one horizontal or vertical neighbor, with new values 0..1 introduced in row major order

1, 6, 43, 352, 2456, 16629, 118863, 863435, 6296517, 46082534, 337974465, 2482292322, 18247326003, 134198700821, 987225183085, 7263640120506, 53448292499747, 393312676324283, 2894385928048833, 21300183245716512

Offset

1,2

Comments

Column 5 of A240656

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=4
..0..0..1..1..0....0..0..0..0..0....0..1..1..1..1....0..1..1..0..0
..0..0..1..1..1....0..0..0..1..0....1..1..1..1..1....1..1..1..0..0
..1..1..0..1..1....0..1..0..0..0....1..1..0..1..1....1..1..1..0..0
..1..1..1..1..0....0..0..0..0..0....1..1..1..1..1....0..1..1..0..0

Crossrefs

Sequence in context: A005786 A071541 A146966 * A220097 A090010 A176732

Adjacent sequences: A240650 A240651 A240652 * A240654 A240655 A240656

Keyword

nonn

Author

R. H. Hardin, Apr 09 2014

Status

approved