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A187633
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T(n,k)=Number of (n+1)X(n+1) 0..k arrays with the array of 2X2 subblock determinants antisymmetric under horizontal and vertical reflection and each non-centerline 2X2 subblock nonsingular
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6
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10, 31, 24, 64, 446, 24, 113, 2924, 1648, 954, 170, 12104, 14044, 557382, 954, 255, 37448, 106892, 31903442, 672698, 194008, 336, 98014, 306320, 686589106, 33869160, 21411605018, 194008, 449, 221640, 1848504, 7836968262, 795758912
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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
.....24........1648....14044....106892.....306320.1848504
....954......557382.31903442.686589106.7836968262
....954......672698.33869160.795758912
.194008.21411605018
.194008
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LINKS
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EXAMPLE
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Some k=3 solutions for 5X5
..2..0..2..1..2....2..0..2..0..2....2..0..2..1..2....2..0..2..1..3
..0..1..0..1..0....0..3..2..3..0....0..2..0..2..0....0..3..0..3..3
..3..1..3..1..3....2..0..2..0..2....2..1..2..0..2....2..0..2..0..2
..0..1..0..1..0....0..3..0..3..0....0..2..0..2..2....1..3..0..3..3
..2..2..2..1..2....2..3..2..0..2....2..2..2..0..2....3..3..2..1..3
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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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