A185491 Number of (n+1)X4 binary arrays with every 2X2 subblock sum equal to some horizontal or vertical neighbor 2X2 subblock sum

36, 708, 5936, 59384, 559188, 5442964, 52129536, 504455124, 4854725100, 46887124724, 451957889654, 4361947021824, 42069191516912, 405915840934652, 3915635058654824, 37777592945924012, 364442490419332262

Offset

1,1

Comments

Column 3 of A185497

Links

R. H. Hardin, Table of n, a(n) for n = 1..251

Example

Some solutions for 6X4
..0..1..1..0....0..1..1..1....0..0..0..0....0..0..1..1....0..0..0..0
..0..0..0..1....0..0..0..0....0..0..0..0....0..1..0..0....0..1..0..1
..0..1..0..0....0..1..1..0....1..0..1..0....0..0..0..1....0..1..0..1
..1..0..1..1....1..1..0..0....0..1..1..0....0..1..1..0....1..1..1..0
..1..0..0..0....0..0..0..1....1..0..1..0....0..0..0..1....1..1..1..1
..1..0..1..1....1..1..0..0....1..0..0..0....0..1..0..1....1..0..1..0

Crossrefs

Sequence in context: A157092 A004419 A268900 * A220758 A054339 A232131

Adjacent sequences: A185488 A185489 A185490 * A185492 A185493 A185494

Keyword

nonn

Author

R. H. Hardin Jan 29 2011

Status

approved