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 A221417 Number of nX6 arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, with every occupancy equal to zero or two 1
 8, 242, 6798, 193809, 5501288, 156275181, 4438212854, 126047555332, 3579725111162, 101663058496174, 2887188399895922, 81994856978729880, 2328615956549861402, 66131601824729724429, 1878106344412444059646 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 6 of A221419 LINKS R. H. Hardin, Table of n, a(n) for n = 1..16 EXAMPLE Some solutions for n=3 ..0..2..2..0..0..2....0..2..0..2..0..2....2..0..2..0..2..0....0..2..0..2..0..0 ..0..0..2..2..0..0....2..0..0..2..0..2....2..2..0..2..0..2....0..2..2..2..2..0 ..0..2..2..2..2..0....2..0..0..2..0..2....0..0..2..0..2..0....2..0..2..0..0..2 CROSSREFS Sequence in context: A302005 A301778 A158263 * A351367 A351370 A272236 Adjacent sequences: A221414 A221415 A221416 * A221418 A221419 A221420 KEYWORD nonn AUTHOR R. H. Hardin Jan 15 2013 STATUS approved

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Last modified March 23 16:06 EDT 2023. Contains 361445 sequences. (Running on oeis4.)