A260493 Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001011

48, 136, 868, 3603, 5848, 31078, 155232, 356236, 1433220, 8676027, 28104408, 96675895, 569988256, 2581001066, 9580891800, 49283809387, 267771460624

Offset

1,1

Comments

Diagonal of A260501

Links

Table of n, a(n) for n=1..17.

Example

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

Crossrefs

Cf. A260501

Sequence in context: A260833 A260972 A244380 * A003502 A129428 A039496

Adjacent sequences: A260490 A260491 A260492 * A260494 A260495 A260496

Keyword

nonn

Author

R. H. Hardin, Jul 27 2015

Status

approved