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A251197 Number of (n+1)X(4+1) 0..1 arrays with no 2X2 subblock having the minimum of its diagonal elements less than the absolute difference of its antidiagonal elements 1
164, 1135, 8976, 73170, 599869, 4923412, 40413851, 331748759, 2723267431, 22354871755, 183507589250, 1506385040601, 12365677555788, 101507905283712, 833262433540456, 6840120381846407, 56149473064044790, 460922199881686977 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A251201

LINKS

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

FORMULA

Empirical: a(n) = 2*a(n-1) +48*a(n-2) +59*a(n-3) -261*a(n-4) -268*a(n-5) +610*a(n-6) +222*a(n-7) -781*a(n-8) +127*a(n-9) +107*a(n-10) +25*a(n-11) -11*a(n-12) -5*a(n-13) +a(n-14) for n>16

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A233997 A233990 A223455 * A038670 A192993 A250935

Adjacent sequences:  A251194 A251195 A251196 * A251198 A251199 A251200

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 30 2014

STATUS

approved

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Last modified May 13 02:02 EDT 2021. Contains 343836 sequences. (Running on oeis4.)