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A251224 Number of (n+1)X(4+1) 0..1 arrays with no 2X2 subblock having the minimum of its diagonal elements greater than the absolute difference of its antidiagonal elements 1
597, 11753, 228689, 4462968, 87024544, 1697323707, 33102432698, 645599385182, 12591115117932, 245564664777825, 4789248769819459, 93404749891139903, 1821673395009104814, 35528107366814113243, 692904893934316841530 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A251228

LINKS

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

FORMULA

Empirical: a(n) = 13*a(n-1) +150*a(n-2) -269*a(n-3) -3713*a(n-4) +1325*a(n-5) +30575*a(n-6) -16105*a(n-7) -99760*a(n-8) +117265*a(n-9) +20076*a(n-10) -71217*a(n-11) +11160*a(n-12) +14210*a(n-13) -3935*a(n-14) -1079*a(n-15) +396*a(n-16) +60*a(n-17)

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A238034 A293098 A160149 * A210384 A215195 A262252

Adjacent sequences: A251221 A251222 A251223 * A251225 A251226 A251227

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 30 2014

STATUS

approved

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Last modified January 28 17:08 EST 2023. Contains 359895 sequences. (Running on oeis4.)