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A240189

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

1, 14, 129, 771, 7170, 44594, 333607, 2715035, 17332017, 134735700, 1005601984, 6796746485, 52922791645, 379298005594, 2679740305873, 20445193269447, 144861185356798, 1052585343798258, 7856125918090405, 55861298280154250

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Column 4 of A240192

LINKS

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

EXAMPLE

Some solutions for n=4

..2..0..0..0....2..0..0..0....2..0..0..0....2..0..0..0....2..0..0..0

..1..3..2..0....1..2..0..2....1..0..0..2....1..0..2..2....1..3..2..0

..1..3..1..0....1..2..0..2....1..2..0..2....2..3..0..0....2..1..2..2