A185770 Number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock sum equal to any horizontal or vertical neighbor 2X2 subblock sum

81, 7074, 2046098, 2171002788, 7861640359954

Offset

1,1

Comments

Diagonal of A185777

Links

Table of n, a(n) for n=1..5.

Example

Some solutions for 3X3
..2..1..2....0..0..1....2..0..0....2..1..1....1..2..1....1..1..0....2..1..1
..0..2..2....1..1..2....1..1..0....2..0..1....0..1..2....1..0..0....0..0..0
..0..1..0....0..1..1....2..2..1....1..1..0....2..0..1....2..1..1....0..2..2

Crossrefs

Sequence in context: A099372 A036515 A223553 * A222441 A206216 A205056

Adjacent sequences: A185767 A185768 A185769 * A185771 A185772 A185773

Keyword

nonn

Author

R. H. Hardin Feb 03 2011

Status

approved