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A251054 Number of (n+1)X(7+1) 0..3 arrays with no 2X2 subblock having the sum of its diagonal elements greater than the absolute difference of its antidiagonal elements 1
29759, 118925, 237143, 533327, 1045337, 2129846, 4118693, 8207451, 16293926, 33460774, 69949629, 150556699, 329921966, 735973997, 1659208781, 3772267028, 8617309611, 19752084140, 45358074700, 104286805752, 239930547292 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A251055

LINKS

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

FORMULA

Empirical: a(n) = 8*a(n-1) -25*a(n-2) +35*a(n-3) -7*a(n-4) -49*a(n-5) +77*a(n-6) -55*a(n-7) +20*a(n-8) -3*a(n-9) for n>12

EXAMPLE

Some solutions for n=2

..2..2..3..3..3..3..3..3....2..0..1..0..3..0..1..2....1..0..1..0..0..1..1..2

..0..0..0..0..0..0..0..0....2..0..1..0..3..0..0..1....2..0..1..0..0..0..0..1

..3..3..3..3..1..1..0..0....3..0..1..0..3..0..0..0....2..0..1..0..0..0..0..0

CROSSREFS

Sequence in context: A228544 A206203 A204283 * A206070 A056747 A157614

Adjacent sequences:  A251051 A251052 A251053 * A251055 A251056 A251057

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 29 2014

STATUS

approved

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Last modified November 15 06:32 EST 2019. Contains 329144 sequences. (Running on oeis4.)