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 A220318 Equals two maps: number of n X 4 binary arrays indicating the locations of corresponding elements equal to exactly two of their king-move neighbors in a random 0..2 n X 4 array. 0
 4, 89, 3167, 56819, 984087, 16290350, 264901883 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 4 of A220319. LINKS Table of n, a(n) for n=1..7. EXAMPLE Some solutions for n=3 ..1..0..0..0....0..0..0..1....1..1..0..0....1..0..1..0....1..0..0..1 ..1..0..1..0....1..1..0..0....0..0..1..1....0..1..1..0....0..1..0..0 ..0..0..1..0....0..0..0..1....1..0..1..0....0..0..1..0....0..1..1..0 CROSSREFS Cf. A220319. Sequence in context: A235858 A262409 A183880 * A220341 A184955 A205295 Adjacent sequences: A220315 A220316 A220317 * A220319 A220320 A220321 KEYWORD nonn AUTHOR R. H. Hardin, Dec 10 2012 STATUS approved

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Last modified June 18 14:56 EDT 2024. Contains 373481 sequences. (Running on oeis4.)