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 A253615 T(n,k)=Number of (n+2)X(k+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 9
 762, 6916, 8664, 61634, 131378, 97232, 551335, 1955619, 2501365, 1100582, 4928315, 29206325, 61983527, 48041910, 12433311, 44053769, 438592379, 1542279536, 1985951362, 920906077, 140520343, 393764260, 6586610559, 38837441580 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ..........762..........6916..........61634..........551335.........4928315 .........8664........131378........1955619........29206325.......438592379 ........97232.......2501365.......61983527......1542279536.....38837441580 ......1100582......48041910.....1985951362.....82792688911...3506966814980 .....12433311.....920906077....63607608304...4447699041022.317272138741263 ....140520343...17665509894..2039056588594.239233980672366 ...1587933587..338854514523.65369339178316 ..17945023519.6500005331011 .202792213952 LINKS R. H. Hardin, Table of n, a(n) for n = 1..49 FORMULA Empirical for column k: k=1: [linear recurrence of order 38] Empirical for row n: n=1: [linear recurrence of order 80] for n>81 EXAMPLE Some solutions for n=2 k=4 ..0..0..0..1..1..1....0..0..1..0..0..2....0..0..0..0..1..1....0..0..1..1..1..1 ..0..0..2..2..0..0....0..0..0..2..0..0....0..0..2..2..2..1....0..0..0..0..0..0 ..1..1..0..0..0..1....1..1..0..0..1..0....1..1..0..0..0..2....2..2..0..0..0..1 ..2..2..1..2..2..2....0..1..1..0..0..1....0..0..1..0..0..0....0..2..2..1..2..2 CROSSREFS Sequence in context: A083643 A083644 A061225 * A253616 A253611 A326369 Adjacent sequences:  A253612 A253613 A253614 * A253616 A253617 A253618 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Jan 05 2015 STATUS approved

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Last modified August 24 16:21 EDT 2019. Contains 326295 sequences. (Running on oeis4.)