A223674 Number of 7Xn 0..1 arrays with rows, diagonals and antidiagonals unimodal

128, 16384, 371641, 2343189, 8052573, 21347949, 51831694, 124050234, 299298122, 726344042, 1747724083, 4106362589, 9335920794, 20497890026, 43553671579, 89873040155, 180673406871, 354644672067, 680755779412, 1279369459830

Offset

1,1

Comments

Row 7 of A223669

Links

R. H. Hardin, Table of n, a(n) for n = 1..33

Example

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

Crossrefs

Sequence in context: A093532 A016747 A189269 * A189622 A189694 A188745

Adjacent sequences: A223671 A223672 A223673 * A223675 A223676 A223677

Keyword

nonn

Author

R. H. Hardin Mar 25 2013

Status

approved