A237933 Number of (n+1)X(3+1) 0..3 arrays with the upper median plus the lower median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.

11701, 228866, 4554824, 94068938, 1903243716, 38477471800, 782578367787, 16010421948796, 325182956026994, 6598288132312864, 134297532801921910, 2737952835801723408, 55665392270619900732, 1131238334494469739760

Offset

1,1

Comments

Column 3 of A237936

Links

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

Example

Some solutions for n=1
..1..1..3..2....3..1..3..1....1..1..1..1....3..3..0..2....3..3..3..0
..2..1..2..3....1..2..2..1....3..0..0..2....1..0..3..2....0..1..1..3

Crossrefs

Sequence in context: A031631 A250923 A015630 * A251347 A346276 A234863

Adjacent sequences: A237930 A237931 A237932 * A237934 A237935 A237936

Keyword

nonn

Author

R. H. Hardin, Feb 16 2014

Status

approved