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A252154 Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 1 3 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 1 3 6 or 7 1
5577, 4732, 9572, 15460, 29276, 57271, 114243, 225966, 451186, 898886, 1796742, 3567622, 7180566, 14252982, 28550806, 57071990, 114226230, 227100406, 457805238, 909211446, 1822429366, 3645696566, 7298665782, 14515253302 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A252157

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = -a(n-1) +2*a(n-2) +14*a(n-3) +14*a(n-4) -28*a(n-5) -56*a(n-6) -56*a(n-7) +112*a(n-8) +64*a(n-9) +64*a(n-10) -128*a(n-11) for n>16

EXAMPLE

Some solutions for n=4

..3..3..2..0..2..0..3....3..2..0..2..0..2..3....3..2..0..2..3..3..3

..0..2..0..2..0..2..0....3..0..2..0..2..0..2....2..0..2..0..2..0..2

..2..0..2..0..2..0..2....3..2..0..2..0..2..0....0..2..0..2..0..2..3

..0..2..0..2..0..2..0....2..0..2..0..2..0..2....2..0..2..0..2..0..3

..2..0..2..0..2..0..2....0..2..0..2..0..2..3....3..2..0..2..0..2..3

..3..3..3..3..3..2..0....3..0..2..0..2..3..3....3..3..3..3..2..0..3

CROSSREFS

Sequence in context: A167281 A252907 A300818 * A065698 A109565 A126784

Adjacent sequences:  A252151 A252152 A252153 * A252155 A252156 A252157

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 14 2014

STATUS

approved

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Last modified July 11 17:24 EDT 2020. Contains 335626 sequences. (Running on oeis4.)