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 A184604 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. 10
 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 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS 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 LINKS R. H. Hardin, Table of n, a(n) for n = 1..180 EXAMPLE 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 CROSSREFS Sequence in context: A121304 A002106 A232316 * A064630 A089793 A076570 Adjacent sequences: A184601 A184602 A184603 * A184605 A184606 A184607 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Jan 18 2011 STATUS approved

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Last modified December 9 11:21 EST 2022. Contains 358700 sequences. (Running on oeis4.)