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A251004 Number of (n+1)X(2+1) 0..2 arrays with no 2X2 subblock having its maximum diagonal element less than the absolute difference of its antidiagonal elements 1
530, 10743, 218298, 4434257, 90065275, 1829373498, 37157718881, 754736624943, 15329985552866, 311378109150967, 6324619621199857, 128463794143755317, 2609318408138865875, 52999700037507178758, 1076514156083681528652 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A251010

LINKS

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

FORMULA

Empirical: a(n) = 27*a(n-1) -169*a(n-2) +800*a(n-3) -2847*a(n-4) +5874*a(n-5) -6458*a(n-6) +2876*a(n-7) +558*a(n-8) -1473*a(n-9) +1896*a(n-10) -1394*a(n-11) +460*a(n-12) -68*a(n-13)

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A158368 A250795 A031724 * A098259 A174761 A031967

Adjacent sequences:  A251001 A251002 A251003 * A251005 A251006 A251007

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 29 2014

STATUS

approved

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Last modified August 11 19:26 EDT 2022. Contains 356066 sequences. (Running on oeis4.)