A241431 Number of nX4 0..3 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest or one plus the sum of the elements antidiagonally to its northeast, modulo 4

7, 21, 74, 515, 1527, 5304, 20690, 61348, 257119, 920918, 3090540, 12030044, 40508800, 149637207, 549347596, 1879652737, 7032173983, 24856568624, 88496458840, 325227255990, 1142461364583, 4148471540343, 14938347230115

Offset

1,1

Comments

Column 4 of A241435

Links

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

Example

Some solutions for n=4
..2..2..3..2....2..2..3..2....2..2..3..2....2..2..3..2....2..2..2..2
..2..1..1..0....2..1..1..2....2..1..1..0....2..1..1..0....2..1..1..0
..3..3..2..2....3..1..0..0....3..1..2..2....3..1..2..0....3..1..2..0
..2..0..0..2....3..2..0..0....3..2..1..2....2..0..2..2....2..0..0..2

Crossrefs

Sequence in context: A135576 A153497 A146247 * A147003 A110683 A092785

Adjacent sequences: A241428 A241429 A241430 * A241432 A241433 A241434

Keyword

nonn

Author

R. H. Hardin, Apr 22 2014

Status

approved