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 A268975 Number of 5Xn 0..2 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two not more than once. 1
 243, 8448, 114048, 1504656, 18852912, 231730344, 2799406656, 33382885464, 393837138576, 4605236160408, 53449814746368, 616434849399384, 7070720929863408, 80721453100802904, 917737124914636128 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 5 of A268971. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 32*a(n-1) -384*a(n-2) +2200*a(n-3) -6494*a(n-4) +9016*a(n-5) -816*a(n-6) -14888*a(n-7) +18879*a(n-8) -5464*a(n-9) -7472*a(n-10) +8336*a(n-11) -3648*a(n-12) +768*a(n-13) -64*a(n-14) for n>18 EXAMPLE Some solutions for n=3 ..1..0..1. .0..2..2. .2..1..2. .0..0..0. .2..1..2. .0..1..2. .0..1..0 ..1..2..1. .1..2..1. .0..1..0. .1..0..0. .0..1..0. .0..1..0. .0..0..1 ..2..2..2. .1..0..0. .0..1..2. .0..0..0. .2..1..2. .0..0..1. .2..2..2 ..1..2..2. .0..0..0. .0..1..2. .1..0..1. .2..2..1. .0..1..0. .1..2..1 ..1..1..2. .0..1..0. .2..1..1. .1..0..2. .1..0..0. .0..0..0. .1..2..2 CROSSREFS Cf. A268971. Sequence in context: A016769 A224015 A059860 * A223207 A224313 A224377 Adjacent sequences: A268972 A268973 A268974 * A268976 A268977 A268978 KEYWORD nonn AUTHOR R. H. Hardin, Feb 16 2016 STATUS approved

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Last modified November 28 14:45 EST 2023. Contains 367419 sequences. (Running on oeis4.)