A185847 Number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock diagonal sum less antidiagonal sum equal to any horizontal or vertical neighbor 2X2 subblock diagonal sum less antidiagonal sum

81, 11610, 9546820, 44035074450, 1150465902394838

Offset

1,1

Comments

Diagonal of A185856

Links

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

Example

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

Crossrefs

Sequence in context: A059988 A017020 A237027 * A058422 A053913 A053895

Adjacent sequences: A185844 A185845 A185846 * A185848 A185849 A185850

Keyword

nonn

Author

R. H. Hardin Feb 05 2011

Status

approved