A253522 Number of (n+1)X(6+1) 0..2 arrays with every 2X2 subblock diagonal minimum minus antidiagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal maximum nondecreasing vertically

192393, 666239, 791232, 930046, 1439791, 2662626, 5591131, 13347833, 35219532, 98975447, 287819707, 851247242, 2537610573, 7591819430, 22748438826, 68210982499, 204589792458, 613715676841, 1841080822709, 5523161533648

Offset

1,1

Comments

Column 6 of A253524

Links

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

Formula

Empirical: a(n) = 9*a(n-1) -33*a(n-2) +65*a(n-3) -75*a(n-4) +51*a(n-5) -19*a(n-6) +3*a(n-7) for n>15

Example

Some solutions for n=1
..0..1..2..0..0..2..0....0..1..2..1..0..0..2....0..1..0..2..0..1..1
..2..1..2..0..0..1..0....0..1..2..1..0..0..0....2..0..0..0..0..2..1

Crossrefs

Sequence in context: A178289 A221003 A206619 * A254420 A254427 A253373

Adjacent sequences: A253519 A253520 A253521 * A253523 A253524 A253525

Keyword

nonn

Author

R. H. Hardin, Jan 03 2015

Status

approved