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 A252853 Number of (n+2)X(n+2) 0..2 arrays with every consecutive three elements in every row, column, diagonal and antidiagonal having exactly two distinct values, and new values 0 upwards introduced in row major order 0
 117, 432, 1197, 3582, 14229, 60588, 275598, 1334322, 6954849, 38574297, 227384559, 1439372097 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A252861 LINKS EXAMPLE Some solutions for n=4 ..0..1..0..1..1..2....0..1..1..0..0..1....0..1..1..0..0..2....0..1..1..2..2..0 ..0..2..2..1..1..0....0..2..2..0..0..2....2..1..2..1..2..2....0..2..2..1..2..1 ..2..2..0..2..0..0....1..2..2..1..1..2....2..2..1..1..0..0....1..1..2..2..0..0 ..0..0..2..2..1..1....1..0..0..1..1..0....1..2..1..2..2..0....1..2..1..1..0..0 ..2..0..0..1..0..1....2..0..0..2..2..0....1..0..0..2..2..1....0..1..1..2..1..2 ..0..2..2..1..1..2....2..1..1..2..2..1....0..0..1..0..1..1....0..2..2..1..1..2 CROSSREFS Sequence in context: A156884 A255022 A217798 * A273125 A327599 A326064 Adjacent sequences: A252850 A252851 A252852 * A252854 A252855 A252856 KEYWORD nonn AUTHOR R. H. Hardin, Dec 23 2014 STATUS approved

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Last modified March 22 17:57 EDT 2023. Contains 361432 sequences. (Running on oeis4.)