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A224643 Number of (n+2)X(n+2) 0..1 matrices with each 3X3 subblock having the same population 0
512, 2688, 10304, 31616, 115328, 356352, 983168, 3220992, 9400448, 25481600 (list; graph; refs; listen; history; text; internal format)
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

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Last modified November 13 21:28 EST 2019. Contains 329106 sequences. (Running on oeis4.)