A186841 Number of (n+1)X(n+1) binary arrays with no 2X2 subblock diagonal sum less antidiagonal sum equal to any horizontal or vertical neighbor 2X2 subblock diagonal sum less antidiagonal sum.

16, 218, 6138, 313412, 32584548, 6898399878, 2945465789710, 2594103702923620, 4715152509383191910

Offset

1,1

Comments

Diagonal of A186850

Links

Table of n, a(n) for n=1..9.

Example

Some solutions for 3X3
..1..1..1....1..1..0....1..0..0....0..1..0....1..1..0....0..1..0....1..0..0
..0..1..1....0..0..0....0..0..0....1..0..0....1..0..1....1..0..1....1..1..0
..1..0..1....0..1..1....1..1..0....0..0..0....0..0..1....1..0..0....1..1..1

Crossrefs

Sequence in context: A076097 A163739 A239042 * A130606 A193380 A076073

Adjacent sequences: A186838 A186839 A186840 * A186842 A186843 A186844

Keyword

nonn

Author

R. H. Hardin, Feb 27 2011

Status

approved