A240777 Number of n X n 0..1 arrays with no element equal to fewer vertical neighbors than horizontal neighbors, with new values 0..1 introduced in row major order

1, 3, 20, 305, 10150, 746346, 121621207, 43857418181, 34948902833111, 61568080277621258, 239709187163404332821

Offset

1,2

Comments

Diagonal of A240783

Links

Table of n, a(n) for n=1..11.

Example

Some solutions for n=4
..0..0..1..0....0..1..0..1....0..1..1..0....0..0..1..0....0..1..0..1
..0..0..1..0....0..1..0..1....0..1..1..0....0..0..1..1....1..0..1..0
..0..0..1..1....0..1..1..0....0..0..1..0....0..1..0..1....0..0..1..1
..0..0..1..1....0..1..1..0....0..0..1..0....0..1..0..1....0..0..1..1

Crossrefs

Sequence in context: A086229 A369322 A130531 * A163138 A201824 A203519

Adjacent sequences: A240774 A240775 A240776 * A240778 A240779 A240780

Keyword

nonn

Author

R. H. Hardin, Apr 12 2014

Status

approved