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 A268892 Number of 7Xn binary arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two exactly once. 1
 0, 2285, 60666, 1706732, 39670270, 911930096, 19876401224, 426591159751, 8952723005030, 185650834624156, 3802871585155968, 77225962585267472, 1555913690406127580, 31149964203775581289, 620153220846869863058 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Row 7 of A268886. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 R. H. Hardin, Empirical recurrence of order 68 FORMULA Empirical recurrence of order 68 (see link above) EXAMPLE Some solutions for n=3 ..1..0..0. .0..1..1. .1..0..0. .0..0..1. .0..1..0. .0..0..0. .0..0..1 ..0..0..1. .0..0..0. .1..1..0. .1..0..0. .0..1..0. .0..0..1. .1..0..0 ..1..0..0. .1..0..1. .0..0..1. .0..0..0. .1..0..1. .1..0..1. .1..0..0 ..1..0..0. .1..0..1. .1..0..0. .0..0..0. .1..0..0. .0..0..1. .0..1..0 ..0..1..0. .0..0..0. .1..0..1. .0..1..1. .1..0..0. .0..1..0. .0..1..0 ..1..0..0. .1..0..1. .0..0..1. .0..0..0. .1..0..1. .0..1..0. .1..0..1 ..1..0..0. .0..0..1. .0..0..0. .0..1..0. .0..0..0. .0..0..1. .0..0..0 CROSSREFS Cf. A268886. Sequence in context: A247401 A264256 A236700 * A206663 A247990 A206103 Adjacent sequences: A268889 A268890 A268891 * A268893 A268894 A268895 KEYWORD nonn AUTHOR R. H. Hardin, Feb 15 2016 STATUS approved

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Last modified October 4 12:52 EDT 2023. Contains 365885 sequences. (Running on oeis4.)