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 A286979 T(n,k) = Number of n X k 0..1 arrays with the number of 1's horizontally or vertically adjacent to some 0 two less than the number of 0's adjacent to some 1. 7
 0, 0, 0, 0, 0, 0, 0, 5, 5, 0, 0, 30, 50, 30, 0, 1, 126, 538, 538, 126, 1, 3, 520, 3932, 8270, 3932, 520, 3, 10, 2088, 32253, 123706, 123706, 32253, 2088, 10, 24, 8192, 238532, 1853532, 3584756, 1853532, 238532, 8192, 24, 60, 32083, 1875212, 27938670 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,8 COMMENTS Table starts ..0.....0........0..........0.............0................1..................3 ..0.....0........5.........30...........126..............520...............2088 ..0.....5.......50........538..........3932............32253.............238532 ..0....30......538.......8270........123706..........1853532...........27938670 ..0...126.....3932.....123706.......3584756........108110791.........3229944132 ..1...520....32253....1853532.....108110791.......6394436704.......382399996325 ..3..2088...238532...27938670....3229944132.....382399996325.....45587718323826 .10..8192..1875212..424161696...98063836816...23061514189084...5491408595796062 .24.32083.14222474.6473516290.2979455186170.1399727072882973.665386690317576640 LINKS R. H. Hardin, Table of n, a(n) for n = 1..143 EXAMPLE Some solutions for n=4, k=4 ..0..1..1..1. .1..0..0..1. .0..0..0..0. .1..0..0..1. .0..1..1..1 ..0..0..0..1. .1..0..0..1. .0..1..1..0. .0..1..0..1. .0..0..1..0 ..1..0..0..0. .0..0..1..1. .0..1..1..0. .0..0..1..1. .0..1..0..1 ..1..0..0..0. .1..0..0..0. .1..0..0..1. .1..0..0..0. .0..1..0..0 CROSSREFS Column 1 is A286209. Sequence in context: A356116 A281165 A282481 * A030047 A176184 A176144 Adjacent sequences: A286976 A286977 A286978 * A286980 A286981 A286982 KEYWORD nonn,tabl AUTHOR R. H. Hardin, May 17 2017 STATUS approved

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Last modified August 7 14:11 EDT 2024. Contains 375013 sequences. (Running on oeis4.)