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 A284218 Number of n X 4 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero. 1
 6, 44, 499, 6511, 91260, 1317770, 19371893, 288303232, 4330336770, 65507133232, 996599090507, 15232184395483, 233708530421124, 3597476814925298, 55530194727444557, 859222993580853779, 13322830756899018309 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 4 of A284222. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 EXAMPLE Some solutions for n=4 ..0..0..0..1. .0..1..1..0. .0..1..0..0. .0..0..1..0. .0..0..1..1 ..0..1..1..0. .1..1..0..0. .1..1..1..1. .0..0..0..1. .0..0..1..0 ..1..1..1..1. .0..1..1..0. .0..0..0..1. .1..1..0..1. .0..1..1..0 ..0..0..0..0. .0..1..1..1. .1..0..1..1. .0..1..0..1. .1..1..1..1 CROSSREFS Cf. A284222. Sequence in context: A124996 A226045 A001852 * A295978 A194928 A267074 Adjacent sequences:  A284215 A284216 A284217 * A284219 A284220 A284221 KEYWORD nonn AUTHOR R. H. Hardin, Mar 23 2017 STATUS approved

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Last modified November 24 04:08 EST 2020. Contains 338607 sequences. (Running on oeis4.)