A224379 Number of 7Xn 0..2 arrays with rows unimodal and antidiagonals nondecreasing.
2187, 419904, 9588028, 86251004, 495660330, 2231009824, 8684742989, 30944246553, 104711652679, 344919346826, 1122234055919, 3627085766299, 11631834618628, 36830849015498, 114465864361342, 347386072561498
Offset: 1
Keywords
Examples
Some solutions for n=3 ..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0 ..0..0..1....0..0..0....0..0..1....0..0..1....0..0..1....1..0..0....0..0..0 ..0..1..1....0..1..0....0..1..0....0..1..0....0..1..0....0..0..0....0..0..0 ..2..2..2....2..0..0....1..0..0....1..2..0....1..1..0....1..1..0....2..1..0 ..2..2..0....0..2..1....1..0..0....2..1..1....1..1..0....1..2..0....1..0..0 ..2..1..1....2..2..1....2..0..0....1..2..1....1..0..0....2..0..0....0..1..2 ..2..2..0....2..2..0....2..1..0....2..1..0....0..1..0....2..1..0....1..2..0
Links
- R. H. Hardin, Table of n, a(n) for n = 1..210
- R. H. Hardin, Empirical polynomial of degree 28
Formula
Empirical polynomial of degree 28 (see link above)
Comments