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 A226852 T(n,k) is the number of n X k (0,1,2) arrays of permanents of 2 X 2 subblocks of some (n+1) X (k+1) binary array. 9
 3, 9, 9, 23, 71, 23, 57, 417, 417, 57, 145, 2291, 4722, 2291, 145, 373, 12961, 49481, 49481, 12961, 373, 957, 75111, 541932, 989731, 541932, 75111, 957, 2449, 435829, 6076168, 20749217, 20749217, 6076168, 435829, 2449, 6267, 2516107, 67929575 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ......3..........9.............23...............57...............145 ......9.........71............417.............2291.............12961 .....23........417...........4722............49481............541932 .....57.......2291..........49481...........989731..........20749217 ....145......12961.........541932.........20749217.........838184554 ....373......75111........6076168........443724135.......34632124236 ....957.....435829.......67929575.......9461306257.....1426163794260 ...2449....2516107......756046291.....201065855279....58502335399707 ...6267...14498679.....8410591772....4271553412923..2398927985473786 ..16045...83596597....93621762980...90781653057341.98415203461205054 ..41083..482294269..1042359550109.1929581833121135 .105185.2782594803.11604658170466 LINKS R. H. Hardin, Table of n, a(n) for n = 1..112 FORMULA Empirical for column k: k=1: a(n) = 3*a(n-1) -2*a(n-2) +2*a(n-3) +a(n-4) -a(n-5) k=2: [order 19] k=3: [order 51] EXAMPLE Some solutions for n=3 k=4 ..0..1..0..0....1..0..1..1....0..0..1..1....0..0..1..0....1..1..1..0 ..2..0..0..1....1..1..2..1....2..1..1..1....0..0..1..0....1..1..2..1 ..1..1..1..0....0..0..1..1....2..1..1..2....1..1..2..2....1..2..1..1 CROSSREFS Sequence in context: A223892 A223789 A223975 * A207235 A207228 A207015 Adjacent sequences:  A226849 A226850 A226851 * A226853 A226854 A226855 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Jun 19 2013 STATUS approved

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Last modified September 19 06:16 EDT 2020. Contains 337177 sequences. (Running on oeis4.)