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 A252959 Number of (n+2)X(6+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
 3465, 651, 985, 1551, 2822, 5100, 8767, 16909, 32096, 57282, 113321, 218547, 401170, 797512, 1556859, 2906865, 5807156, 11393142, 21638149, 43233631, 85341470, 163967772, 328165247, 649686165, 1261654624, 2524384498, 5014289697 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 6 of A252961 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 5*a(n-1) -6*a(n-2) -2*a(n-3) -5*a(n-4) +15*a(n-5) +53*a(n-6) -145*a(n-7) +120*a(n-8) -44*a(n-9) +25*a(n-10) -21*a(n-11) +6*a(n-12) for n>15 EXAMPLE Some solutions for n=2 ..0..1..0..0..2..0..0..3....0..1..1..2..1..1..2..1....0..1..1..2..2..3..3..0 ..4..4..0..4..4..0..4..4....1..0..1..1..2..1..1..2....3..0..0..1..1..2..2..4 ..1..0..0..1..0..0..2..0....3..3..1..3..3..1..3..3....2..3..3..0..0..1..1..2 ..0..1..0..0..1..0..0..2....2..1..1..0..1..1..2..1....4..2..2..3..3..0..0..1 CROSSREFS Sequence in context: A235830 A235586 A252967 * A224686 A125017 A307111 Adjacent sequences:  A252956 A252957 A252958 * A252960 A252961 A252962 KEYWORD nonn AUTHOR R. H. Hardin, Dec 25 2014 STATUS approved

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Last modified December 1 05:20 EST 2021. Contains 349426 sequences. (Running on oeis4.)