A260362 Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001111

48, 127, 912, 4633, 6144, 38370, 265120, 551542, 2092680, 17786146, 60491904, 183202732, 1313066840, 6986822950, 25056637336, 145821754612

Offset

1,1

Comments

Diagonal of A260370

Links

Table of n, a(n) for n=1..16.

Example

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

Crossrefs

Cf. A260370

Sequence in context: A232938 A362045 A194952 * A114444 A044299 A044680

Adjacent sequences: A260359 A260360 A260361 * A260363 A260364 A260365

Keyword

nonn

Author

R. H. Hardin, Jul 23 2015

Status

approved