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 A278279 Number of nX7 0..1 arrays with every element both equal and not equal to some elements at offset (-1,-1) (-1,0) (-1,1) (0,-1) (0,1) or (1,0), with upper left element zero. 1
 0, 317, 20736, 1870365, 157609938, 13538466880, 1158266740087, 99182079495633, 8491049196878995, 726961954823301592, 62238120572972036597, 5328470518831632979210, 456192709882426407920004 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Column 7 of A278280. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 EXAMPLE Some solutions for n=3 ..0..0..0..1..1..0..0. .0..1..1..1..0..1..0. .0..1..1..1..0..1..1 ..1..1..0..1..0..0..1. .0..1..0..1..0..1..0. .0..1..0..0..0..1..0 ..1..0..1..0..0..1..1. .0..1..0..1..1..1..0. .0..1..0..1..1..0..0 CROSSREFS Cf. A278280. Sequence in context: A243958 A273804 A142130 * A058002 A252246 A252254 Adjacent sequences: A278276 A278277 A278278 * A278280 A278281 A278282 KEYWORD nonn AUTHOR R. H. Hardin, Nov 16 2016 STATUS approved

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Last modified December 4 01:51 EST 2023. Contains 367541 sequences. (Running on oeis4.)