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A184604
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T(n,k) = 1/4 the number of (n+1) X (k+1) binary arrays with equal numbers of 2 X 2 subblocks with sums 1 and 3.
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10
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2, 5, 5, 16, 24, 16, 58, 156, 156, 58, 214, 1123, 1986, 1123, 214, 784, 8268, 28192, 28192, 8268, 784, 2880, 60569, 411825, 782948, 411825, 60569, 2880, 10704, 446426, 6045460, 22581061, 22581061, 6045460, 446426, 10704, 40264, 3333345, 89538170
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OFFSET
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1,1
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COMMENTS
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Table starts
......2.........5...........16..............58................214
......5........24..........156............1123...............8268
.....16.......156.........1986...........28192.............411825
.....58......1123........28192..........782948...........22581061
....214......8268.......411825........22581061.........1291076970
....784.....60569......6045460.......661355087........75369979530
...2880....446426.....89538170.....19597196907......4461217004146
..10704...3333345...1339793447....586441134417....266823559411796
..40264..25146354..20215904926..17688240987365..16087490826015621
.152728.190958245.306972320468.536871796215114.976144514798586404
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LINKS
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EXAMPLE
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Some solutions for 4 X 3:
..1..0..0....0..0..1....1..1..1....1..0..1....0..0..0....1..0..0....1..0..0
..1..1..0....1..1..1....0..0..1....0..1..1....1..0..1....0..0..1....0..1..0
..0..0..1....0..0..0....0..0..0....0..1..1....0..1..1....1..1..1....0..1..1
..1..1..0....1..1..0....1..1..1....0..0..0....0..1..0....0..1..1....0..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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