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A251314 Number of (n+1)X(5+1) 0..1 arrays with no 2X2 subblock having the maximum of its diagonal elements greater than the absolute difference of its antidiagonal elements 1
365, 2199, 12859, 76167, 451826, 2688099, 16024915, 95495471, 568712168, 3387770571, 20189713569, 120329111819, 717061495216, 4273007995794, 25464690252601, 151759389097464, 904412481052043, 5389803787476828 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A251317

LINKS

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

FORMULA

Empirical: a(n) = 21*a(n-1) -209*a(n-2) +1373*a(n-3) -6671*a(n-4) +24836*a(n-5) -72066*a(n-6) +164681*a(n-7) -296387*a(n-8) +415164*a(n-9) -439957*a(n-10) +329594*a(n-11) -140172*a(n-12) -13684*a(n-13) +64019*a(n-14) -38491*a(n-15) +1377*a(n-16) +12766*a(n-17) -8365*a(n-18) +3157*a(n-19) -938*a(n-20) -135*a(n-21) +270*a(n-22) -41*a(n-23) +4*a(n-24) -5*a(n-25) -a(n-26) for n>27

EXAMPLE

Some solutions for n=4

..1..1..0..0..0..0....0..1..0..1..1..1....1..1..0..0..0..0....1..1..0..1..1..1

..0..1..1..0..0..0....0..1..0..0..0..1....0..1..1..0..0..0....0..1..1..0..0..1

..0..0..1..1..1..1....0..1..1..0..0..0....0..0..1..0..0..0....0..0..1..0..0..1

..0..0..0..0..0..0....0..0..1..1..0..0....1..0..1..1..0..0....0..0..1..1..0..1

..1..1..1..1..1..1....1..0..0..1..1..0....1..1..0..1..1..1....1..1..0..1..0..1

CROSSREFS

Sequence in context: A062681 A259948 A203806 * A275182 A275130 A274727

Adjacent sequences:  A251311 A251312 A251313 * A251315 A251316 A251317

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 01 2014

STATUS

approved

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Last modified October 16 12:07 EDT 2021. Contains 348041 sequences. (Running on oeis4.)