A223998 Number of nX7 0..2 arrays with antidiagonals unimodal and rows and diagonals nondecreasing

36, 736, 8291, 71061, 559188, 4368458, 34534687, 276286000, 2229871293, 18115082917, 147889219961, 1211856739505, 9958518859510, 82010005661441, 676451232895869, 5586333937854878, 46174727441274521, 381916881456838766

Offset

1,1

Comments

Column 7 of A223999

Links

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

R. H. Hardin, Empirical recurrence of order 54

Formula

Empirical recurrence of order 54 (see link above)

Example

Some solutions for n=3
..0..0..0..0..0..1..1....0..1..1..1..1..1..1....0..0..0..0..1..1..1
..0..0..0..0..1..1..2....0..0..1..1..1..1..2....0..1..1..1..1..2..2
..1..1..1..2..2..2..2....0..0..1..1..1..2..2....0..0..1..1..1..1..2

Crossrefs

Sequence in context: A054339 A232131 A138832 * A109405 A064541 A058001

Adjacent sequences: A223995 A223996 A223997 * A223999 A224000 A224001

Keyword

nonn

Author

R. H. Hardin Mar 30 2013

Status

approved