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 A265657 Number of 3Xn arrays containing n copies of 0..3-1 with no equal diagonal or antidiagonal neighbors and new values introduced sequentially from 0. 1
 1, 7, 20, 104, 476, 2428, 12362, 64454, 342054, 1828533, 9928762, 54157257, 298686238, 1653956425, 9228016750, 51675269021, 290902199460, 1642884250719, 9314059354170, 52950162099266, 301906974462620, 1725418938358656 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Row 3 of A265656. LINKS R. H. Hardin, Table of n, a(n) for n = 1..94 EXAMPLE Some solutions for n=4 ..0..1..0..2....0..1..2..0....0..0..1..2....0..1..1..0....0..1..2..0 ..0..1..0..1....2..1..2..1....2..2..1..2....2..2..2..2....0..1..2..0 ..2..2..2..1....2..1..0..0....1..0..1..0....0..1..1..0....2..1..2..1 CROSSREFS Cf. A265656. Sequence in context: A301777 A299181 A299944 * A298214 A299346 A009370 Adjacent sequences: A265654 A265655 A265656 * A265658 A265659 A265660 KEYWORD nonn AUTHOR R. H. Hardin, Dec 12 2015 STATUS approved

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Last modified March 22 08:11 EDT 2023. Contains 361415 sequences. (Running on oeis4.)