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 A252907 Number of (n+2)X(3+2) 0..3 arrays with every consecutive three elements in every row and column having exactly 2 distinct values, in every diagonal 1 or 2 distinct values, in every antidiagonal 2 or 3 distinct values, and new values 0 upwards introduced in row major order 1
 5567, 42647, 361750, 3321526, 31101826, 293166855, 2779386634, 26422127321, 251365182149, 2393376335753, 22799665288410, 217194895643722, 2069420807703495, 19719401115769839, 187896935466387368 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 3 of A252910 LINKS R. H. Hardin, Table of n, a(n) for n = 1..98 EXAMPLE Some solutions for n=2 ..0..0..1..1..2....0..1..0..1..1....0..1..1..2..1....0..1..0..1..0 ..3..3..1..3..1....2..1..1..3..1....2..2..0..2..2....0..1..0..0..1 ..3..0..0..1..1....2..0..0..1..0....2..2..0..0..2....1..2..1..1..0 ..2..0..0..3..3....3..0..0..1..1....0..0..2..2..0....0..1..0..0..1 CROSSREFS Sequence in context: A045104 A043512 A167281 * A300818 A252154 A065698 Adjacent sequences:  A252904 A252905 A252906 * A252908 A252909 A252910 KEYWORD nonn AUTHOR R. H. Hardin, Dec 24 2014 STATUS approved

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Last modified September 27 04:10 EDT 2021. Contains 347673 sequences. (Running on oeis4.)