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 A252967 Number of (6+2)X(n+2) 0..4 arrays with every consecutive three elements in every row and diagonal having exactly two distinct values, and in every column and antidiagonal not having exactly two distinct values, and new values 0 upwards introduced in row major order 1
 3461, 1186, 1681, 2201, 3315, 5100, 6855, 10888, 16745, 24270, 38635, 61564, 92665, 151163, 244971, 384029, 637145, 1047568, 1703415, 2841480, 4783985, 7873606, 13425939, 22559724, 38253177, 64736779, 111363563, 187737521, 324817225 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 6 of A252961 LINKS R. H. Hardin, Table of n, a(n) for n = 1..157 FORMULA Empirical: a(n) = a(n-1) +6*a(n-2) -a(n-3) -15*a(n-4) -20*a(n-5) +26*a(n-6) +54*a(n-7) -12*a(n-8) -48*a(n-9) -48*a(n-10) +48*a(n-11) +25*a(n-12) -25*a(n-13) +22*a(n-14) -27*a(n-15) +27*a(n-16) -12*a(n-17) +18*a(n-18) -18*a(n-19) for n>21 EXAMPLE Some solutions for n=2 ..0..0..1..0....0..1..1..2....0..1..0..0....0..1..1..2....0..0..1..0 ..1..0..0..2....3..3..4..4....2..2..1..1....2..3..3..4....2..1..1..3 ..3..0..3..3....4..0..0..1....3..3..2..2....4..0..0..1....1..2..1..1 ..0..0..1..0....1..1..3..3....0..0..3..3....1..2..2..0....4..4..1..4 ..1..0..0..1....3..4..4..0....4..4..0..0....3..4..4..2....3..1..1..2 ..2..0..2..2....2..2..1..1....2..2..4..4....0..1..1..4....1..3..1..1 ..0..0..1..0....0..3..3..4....1..1..2..1....2..3..3..1....0..0..1..0 ..4..0..0..1....4..4..2..2....0..0..1..0....4..0..0..3....4..1..1..3 CROSSREFS Sequence in context: A235835 A235830 A235586 * A252959 A224686 A125017 Adjacent sequences:  A252964 A252965 A252966 * A252968 A252969 A252970 KEYWORD nonn AUTHOR R. H. Hardin, Dec 25 2014 STATUS approved

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Last modified May 22 00:25 EDT 2019. Contains 323472 sequences. (Running on oeis4.)