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A251051 Number of (n+1)X(4+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
2243, 11280, 24893, 59215, 123396, 262200, 533327, 1107413, 2297926, 4888898, 10549941, 23231818, 51804184, 116876925, 265531368, 606511919, 1389607505, 3190603867, 7334375879, 16872832209, 38832132163, 89393731501, 205817073537 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 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=4

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

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

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

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

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

CROSSREFS

Sequence in context: A183771 A271470 A263912 * A107529 A260608 A125522

Adjacent sequences:  A251048 A251049 A251050 * A251052 A251053 A251054

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 29 2014

STATUS

approved

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Last modified October 15 15:14 EDT 2019. Contains 328030 sequences. (Running on oeis4.)