A253291 Number of (n+1)X(3+1) 0..2 arrays with every 2X2 subblock sum differing from its neighbors horizontally, vertically, diagonally and antidiagonally

3844, 23546, 140536, 1029888, 7431136, 52784020, 376392916, 2705942488, 19441124904, 139538118106, 1001630063642, 7192898044676, 51663362450690, 371000801080586, 2664302414067690, 19133126021242278, 137412998986250836

Offset

1,1

Comments

Column 3 of A253294

Links

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

Example

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

Crossrefs

Sequence in context: A237371 A061404 A234827 * A253161 A185773 A031560

Adjacent sequences: A253288 A253289 A253290 * A253292 A253293 A253294

Keyword

nonn

Author

R. H. Hardin, Dec 29 2014

Status

approved