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 A232030 Number of (n+1)X(n+1) 0..1 arrays with every element equal to some horizontal, vertical or antidiagonal neighbor, with top left element zero 1
 3, 76, 6958, 2504637, 3495632937, 18901428867727, 396123615709336849, 32176890056971879660693, 10130525958339456502522410735, 12362161675037799092546476765921887 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A232038 LINKS R. H. Hardin, Table of n, a(n) for n = 1..12 EXAMPLE Some solutions for n=3 ..0..1..1..1....0..0..0..1....0..0..1..0....0..0..0..0....0..0..0..0 ..0..1..0..1....0..0..0..1....1..0..1..0....1..0..0..0....0..1..0..0 ..1..0..0..0....0..0..1..1....1..1..1..1....1..0..0..0....0..1..0..1 ..0..0..1..1....0..1..1..1....0..0..0..1....0..1..1..0....1..0..1..1 CROSSREFS Sequence in context: A300386 A054747 A302375 * A054950 A335722 A183961 Adjacent sequences: A232027 A232028 A232029 * A232031 A232032 A232033 KEYWORD nonn AUTHOR R. H. Hardin, Nov 17 2013 STATUS approved

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Last modified September 26 17:49 EDT 2023. Contains 365666 sequences. (Running on oeis4.)