A224643 Number of (n+2)X(n+2) 0..1 matrices with each 3X3 subblock having the same population

512, 2688, 10304, 31616, 115328, 356352, 983168, 3220992, 9400448, 25481600

Offset

1,1

Comments

Diagonal of A224651

Links

Table of n, a(n) for n=1..10.

Example

Some solutions for n=2
..0..1..0..0....0..0..1..1....1..0..0..0....0..1..1..0....0..0..1..0
..0..1..1..0....0..1..1..0....0..0..1..1....0..1..0..1....1..1..0..1
..0..1..1..0....1..1..0..0....1..1..1..1....1..0..0..0....0..0..0..0
..0..1..0..0....0..1..0..1....1..0..0..0....0..1..1..0....1..0..0..1

Crossrefs

Sequence in context: A254998 A254991 A186840 * A186832 A254553 A254483

Adjacent sequences: A224640 A224641 A224642 * A224644 A224645 A224646

Keyword

nonn

Author

R. H. Hardin Apr 13 2013

Status

approved