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 A253617 Number of (2+2)X(n+2) 0..2 arrays with every consecutive three elements in every row and diagonal having one or two distinct values, and in every column and antidiagonal having two or three distinct values, and new values 0 upwards introduced in row major order 1
 8664, 131378, 1955619, 29206325, 438592379, 6586610559, 98874441146, 1484785130392, 22297719051563, 334849977802421, 5028613048594528, 75517616024925219, 1134092007833070215, 17031337435362085847 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 2 of A253615 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 EXAMPLE Some solutions for n=2 ..0..0..0..1....0..0..1..1....0..0..0..1....0..0..0..0....0..0..1..1 ..1..1..0..0....1..2..1..2....1..0..1..1....1..1..2..1....2..2..0..0 ..2..1..1..1....0..2..0..0....2..2..0..0....0..1..1..0....0..2..2..1 ..0..2..2..0....0..0..1..0....0..2..2..1....1..2..2..0....2..1..1..0 CROSSREFS Sequence in context: A205913 A205905 A205763 * A203737 A214487 A254697 Adjacent sequences: A253614 A253615 A253616 * A253618 A253619 A253620 KEYWORD nonn AUTHOR R. H. Hardin, Jan 05 2015 STATUS approved

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Last modified August 12 15:11 EDT 2024. Contains 375113 sequences. (Running on oeis4.)