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A187624
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T(n,k)=Number of (n+1)X(n+1) 0..k arrays with each 2X2 non-center subblock determinant nonzero and the array of 2X2 subblock determinants antisymmetric under 90 degree rotation
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6
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10, 31, 24, 64, 446, 2, 113, 2924, 60, 948, 170, 12104, 390, 324452, 36, 255, 37448, 2146, 12278892, 70548, 190972, 336, 98014, 5324, 221177664, 4232368, 6090023738, 3020, 449, 221640, 16042, 1896404966
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OFFSET
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1,1
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COMMENTS
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Table starts
.....10.........31.......64.......113........170...255....336.449
.....24........446.....2924.....12104......37448.98014.221640
......2.........60......390......2146.......5324.16042
....948.....324452.12278892.221177664.1896404966
.....36......70548..4232368
.190972.6090023738
...3020
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LINKS
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EXAMPLE
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Some k=3 solutions for 5X5
..1..0..1..0..1....2..0..1..3..2....2..0..1..2..3....1..0..2..0..1
..0..2..1..2..0....0..2..0..2..0....0..2..0..2..1....0..2..1..2..2
..1..0..1..0..1....1..0..1..0..1....1..3..2..0..1....2..0..3..0..2
..3..2..2..2..3....2..2..3..2..1....0..2..0..2..1....0..2..0..2..2
..1..0..1..0..1....2..0..1..0..2....2..3..1..0..2....1..3..2..0..1
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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