

A183541


T(n,k)=Number of nXk 0..3 arrays with each element equal to either the sum mod 4 of its horizontal and vertical neighbors or the sum mod 4 of its diagonal and antidiagonal neighbors


7



1, 4, 4, 7, 16, 7, 10, 43, 43, 10, 22, 128, 133, 128, 22, 43, 416, 1326, 1326, 416, 43, 73, 1287, 4583, 16704, 4583, 1287, 73, 139, 3996, 28498, 124568, 124568, 28498, 3996, 139, 268, 12594, 146315, 1260440, 1150368, 1260440, 146315, 12594, 268, 487, 39539
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OFFSET

1,2


COMMENTS

Table starts
...1.....4......7......10......22......43.......73....139...268.487
...4....16.....43.....128.....416....1287.....3996..12594.39539
...7....43....133....1326....4583...28498...146315.714260
..10...128...1326...16704..124568.1260440.12593728
..22...416...4583..124568.1150368
..43..1287..28498.1260440
..73..3996.146315
.139.12594
.268


LINKS



EXAMPLE

Some solutions for 4X3
..3..0..1....0..1..0....0..0..0....2..0..0....0..3..3....3..3..0....2..0..0
..3..2..1....3..0..2....0..0..1....2..2..0....3..0..0....0..0..0....0..2..0
..2..2..2....2..2..2....3..0..1....2..3..2....0..0..1....0..1..0....3..0..1
..2..0..2....0..2..0....3..0..0....3..0..2....1..1..0....0..0..1....3..0..1


CROSSREFS



KEYWORD



AUTHOR



STATUS

approved



