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 A252859 Number of (n+2)X(6+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 1
 11286, 4986, 6795, 13590, 28728, 60588, 126306, 266391, 562293, 1185867, 2491002, 5266044, 11098008, 23380335, 49262301, 103991625, 219100158, 461718972, 973617264, 2053180017, 4326686289, 9121144149, 19232567028, 40543286472 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 6 of A252861 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = -a(n-1) +4*a(n-3) +16*a(n-4) +16*a(n-5) +9*a(n-6) -11*a(n-7) -58*a(n-8) -64*a(n-9) -14*a(n-10) +79*a(n-11) +143*a(n-12) +104*a(n-13) +13*a(n-14) -101*a(n-15) -124*a(n-16) -74*a(n-17) +2*a(n-18) +34*a(n-19) +28*a(n-20) +8*a(n-21) -4*a(n-22) -4*a(n-23) for n>26 EXAMPLE Some solutions for n=4 ..0..1..0..1..1..2..1..2....0..0..1..1..2..2..0..0....0..0..1..0..1..0..0..2 ..2..0..0..2..2..1..1..0....0..1..0..0..2..0..2..2....1..0..0..2..2..0..0..1 ..2..1..2..1..2..2..0..2....2..0..0..1..1..2..2..0....1..2..1..2..1..2..1..2 ..1..1..2..2..1..1..0..0....2..1..1..0..1..0..0..2....2..2..1..1..2..2..1..1 ..1..2..1..2..1..2..1..2....0..0..1..1..2..2..0..2....1..1..2..1..2..1..2..2 ..0..2..2..0..0..1..1..2....0..1..0..0..2..2..1..1....2..1..1..0..0..2..2..1 CROSSREFS Sequence in context: A195654 A195649 A110375 * A177216 A112441 A104017 Adjacent sequences:  A252856 A252857 A252858 * A252860 A252861 A252862 KEYWORD nonn AUTHOR R. H. Hardin, Dec 23 2014 STATUS approved

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Last modified April 11 00:03 EDT 2021. Contains 342877 sequences. (Running on oeis4.)