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A203883 Number of (n+1)X5 0..6 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements 1
1399489, 222645367, 39572771665, 7265109130279, 1337957259758497, 247090069595954263, 45601045546133880817, 8420752441494326059399, 1554515329791272083118401, 287024986300394858824793527 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A203887
LINKS
FORMULA
Empirical: a(n) = 115*a(n-1) +17016*a(n-2) -763308*a(n-3) -1177416*a(n-4) +49714560*a(n-5) +35870688*a(n-6) -153031680*a(n-7)
EXAMPLE
Some solutions for n=4
..4..4..1..1..1....2..2..0..5..1....5..3..5..6..3....2..4..1..5..0
..6..4..4..1..0....5..2..2..0..5....6..5..0..5..6....2..2..4..1..5
..2..6..4..4..1....6..5..2..2..0....1..6..5..4..5....5..2..2..4..1
..2..2..6..4..4....4..6..5..2..2....6..2..6..5..3....4..5..2..2..4
..2..3..2..6..4....1..4..6..5..2....5..6..0..6..5....0..4..5..2..2
CROSSREFS
Sequence in context: A234548 A069315 A022209 * A352611 A337916 A064871
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 07 2012
STATUS
approved

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Last modified May 27 06:12 EDT 2024. Contains 372848 sequences. (Running on oeis4.)