A237932 Number of (n+1)X(2+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

1718, 19694, 228866, 2744048, 32465580, 383375880, 4542257982, 54067139244, 641031056118, 7590349989188, 90016555755486, 1069015366100190, 12678249163053274, 150277119869692568, 1782427688138307804

Offset

1,1

Comments

Column 2 of A237936

Links

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

Example

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

Crossrefs

Sequence in context: A068303 A212929 A252610 * A276458 A252857 A234906

Adjacent sequences: A237929 A237930 A237931 * A237933 A237934 A237935

Keyword

nonn

Author

R. H. Hardin, Feb 16 2014

Status

approved