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 A268977 Number of 7Xn 0..2 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two not more than once. 1
 2187, 184320, 5598720, 167226768, 4823705520, 137497776840, 3870355944960, 107884943899488, 2981278225929744, 81772049776604472, 2228316762081730176, 60378377050028640600, 1627890867639031100112, 43698886755490031302440 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 7 of A268971. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 R. H. Hardin, Empirical recurrence of order 54 FORMULA Empirical recurrence of order 54 (see link above) EXAMPLE Some solutions for n=2 ..0..0. .2..0. .0..0. .0..1. .1..0. .1..0. .0..0. .1..1. .1..0. .0..1 ..1..0. .1..2. .1..2. .1..0. .1..2. .0..1. .0..1. .2..2. .0..1. .0..2 ..1..1. .1..0. .2..2. .0..1. .1..2. .2..2. .2..2. .1..2. .0..1. .1..2 ..0..0. .0..0. .2..1. .2..1. .0..0. .2..1. .1..0. .1..0. .2..1. .2..2 ..0..1. .0..0. .2..2. .2..1. .1..2. .0..2. .1..2. .1..0. .0..0. .1..0 ..2..1. .0..1. .0..1. .2..2. .2..2. .1..2. .2..1. .0..1. .0..1. .0..1 ..2..2. .2..1. .2..2. .1..0. .2..2. .1..0. .0..1. .2..2. .0..0. .2..2 CROSSREFS Cf. A268971. Sequence in context: A224005 A210057 A232029 * A224358 A224017 A016771 Adjacent sequences: A268974 A268975 A268976 * A268978 A268979 A268980 KEYWORD nonn AUTHOR R. H. Hardin, Feb 16 2016 STATUS approved

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Last modified February 26 09:21 EST 2024. Contains 370338 sequences. (Running on oeis4.)