A240262 Number of 3 X n 0..3 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest or one plus the sum of the elements antidiagonally to its northeast, modulo 4.

16, 89, 707, 5610, 45436, 368247, 2999288, 24450441, 199470500, 1627847603, 13287235058, 108467239175, 885493532143, 7229102785596, 59018758172819, 481836050193261, 3933783172023771, 32116083219836091, 262201568692536081, 2140662963928375887, 17476781872426426514

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..75

Example

Some solutions for n=5:
..0..0..0..0..2....2..0..0..2..2....0..2..2..2..2....0..0..2..2..2
..0..2..0..2..2....0..2..0..0..2....2..0..0..0..2....0..2..2..2..2
..2..2..0..2..2....2..0..2..0..0....0..0..2..1..2....2..2..0..0..2

Crossrefs

Row 3 of A240260.

Sequence in context: A302084 A229399 A269078 * A264531 A192129 A253131

Adjacent sequences: A240259 A240260 A240261 * A240263 A240264 A240265

Keyword

nonn

Author

R. H. Hardin, Apr 03 2014

Status

approved