A188305 Number of (n+1)X4 binary arrays with every 2X2 subblock sum equal to exactly one or two horizontal and vertical neighbor 2X2 subblock sums

36, 664, 3784, 30096, 203584, 1514522, 10660334, 77627954, 553295656, 3999339740, 28648406172, 206430645818, 1481793194338, 10663317931808, 76610286157360, 550993785392346, 3960074619398180, 28474664232145762, 204684231700055702

Offset

1,1

Comments

Column 3 of A188311

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions for 3X4
..1..0..1..1....1..1..1..1....0..1..1..1....1..0..1..1....0..0..1..0
..0..1..1..1....1..1..0..1....1..1..1..1....1..1..1..0....1..1..0..1
..1..0..1..1....1..1..0..1....1..0..0..0....1..1..1..1....0..0..0..0

Crossrefs

Sequence in context: A368062 A231767 A278277 * A161649 A162150 A162388

Adjacent sequences: A188302 A188303 A188304 * A188306 A188307 A188308

Keyword

nonn

Author

R. H. Hardin Mar 27 2011

Status

approved