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 A207494 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 1 0 0 vertically 1
 2, 16, 102, 1004, 14253, 237576, 5715255, 163471950, 6200122170, 294261603282, 17977383927693, 1375335087129521, 138833395825965196, 17233401412131428885, 2924391663494366576782, 600552802391087361313757 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A207500 LINKS R. H. Hardin, Table of n, a(n) for n = 1..18 EXAMPLE Some solutions for n=4 ..1..1..0..1....0..0..1..0....1..1..0..1....0..1..0..0....1..1..0..1 ..0..1..0..0....1..1..1..1....1..1..0..1....0..0..1..0....0..0..1..0 ..1..1..0..1....0..0..1..0....0..1..0..0....0..1..0..0....1..1..1..1 ..0..1..0..1....1..1..0..1....1..0..0..1....0..0..1..0....1..0..1..0 CROSSREFS Sequence in context: A208282 A207236 A207955 * A207117 A208415 A207945 Adjacent sequences:  A207491 A207492 A207493 * A207495 A207496 A207497 KEYWORD nonn AUTHOR R. H. Hardin Feb 18 2012 STATUS approved

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Last modified December 16 09:06 EST 2019. Contains 330020 sequences. (Running on oeis4.)