A260007 Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000101 00010101 or 01010101

36, 98, 889, 8450, 87024, 1210568, 33390411, 1002982472, 36725478315, 1784334292232, 146147465448539, 13711953572564552, 1749785434450518265, 284207752803358740608, 71779827399341536843153

Offset

1,1

Comments

Diagonal of A260015

Links

R. H. Hardin, Table of n, a(n) for n = 1..21

Example

Some solutions for n=4
..0..1..0..1..0..0....0..0..1..0..0..0....0..0..1..0..1..0....0..0..1..0..1..0
..1..0..1..0..1..0....0..1..0..0..0..1....0..1..0..1..0..0....0..0..0..1..0..1
..0..1..0..1..0..1....0..0..1..0..1..0....0..0..1..0..0..0....1..0..1..0..1..0
..1..0..1..0..1..0....0..1..0..1..0..1....0..1..0..1..0..1....0..1..0..1..0..1
..0..1..0..1..0..0....1..0..1..0..0..0....1..0..1..0..1..0....1..0..1..0..1..0
..0..0..0..0..0..0....0..0..0..0..0..1....0..0..0..0..0..0....0..1..0..1..0..1

Crossrefs

Cf. A260015

Sequence in context: A057392 A287613 A118632 * A306213 A114819 A137945

Adjacent sequences: A260004 A260005 A260006 * A260008 A260009 A260010

Keyword

nonn

Author

R. H. Hardin, Jul 13 2015

Status

approved