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

597, 11753, 228689, 4462968, 87024544, 1697323707, 33102432698, 645599385182, 12591115117932, 245564664777825, 4789248769819459, 93404749891139903, 1821673395009104814, 35528107366814113243, 692904893934316841530

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