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 A260919 Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010101 00101011 or 01010101 1
 36, 68, 401, 2208, 11608, 81848, 971381, 10662976, 181422568, 3460352248, 98952552192, 2935432680396, 136085020244379, 6702623882827610, 502445435345158337, 39885899773762437744, 4881874517425716225227 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A260927 LINKS R. H. Hardin, Table of n, a(n) for n = 1..24 EXAMPLE Some solutions for n=4 ..0..1..0..1..0..0....0..1..0..1..0..1....0..1..0..1..0..0....0..1..0..1..0..1 ..0..0..1..0..0..0....0..0..1..0..1..1....0..0..1..0..0..0....1..0..1..0..1..0 ..0..1..0..1..0..1....0..1..0..1..0..0....0..1..0..1..0..1....0..1..0..1..0..1 ..1..0..1..0..1..0....1..0..1..0..1..0....1..0..1..0..1..0....1..0..1..0..1..0 ..0..1..0..1..0..0....0..1..0..1..0..1....0..0..0..1..0..1....0..0..0..1..0..1 ..0..0..1..0..1..0....0..0..1..0..0..1....0..1..1..0..0..1....0..0..1..0..1..0 CROSSREFS Cf. A260927 Sequence in context: A068144 A182428 A208128 * A247381 A249726 A192026 Adjacent sequences:  A260916 A260917 A260918 * A260920 A260921 A260922 KEYWORD nonn AUTHOR R. H. Hardin, Aug 04 2015 STATUS approved

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Last modified May 31 16:29 EDT 2020. Contains 334748 sequences. (Running on oeis4.)