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A260601 Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000101 00010001 or 00010101 0
40, 118, 610, 3388, 26148, 228678, 2707758, 34290074, 611554908, 11693188136, 307867992364, 8702002242846, 342462331784712, 14413275071964342, 841342111382685118, 52702190659812715690 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A260609

LINKS

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

EXAMPLE

Some solutions for n=4

..0..1..0..1..0..1....0..0..1..0..0..0....0..0..0..0..1..0....0..1..0..1..0..0

..1..0..0..0..1..0....0..1..0..0..0..1....0..0..0..1..0..0....0..0..1..0..0..0

..0..1..0..0..0..0....1..0..0..0..1..0....1..0..1..0..1..0....0..1..0..0..0..1

..1..0..1..0..1..0....0..1..0..1..0..1....0..1..0..0..0..1....0..0..1..0..1..0

..0..0..0..1..0..1....1..0..1..0..0..0....0..0..0..0..1..0....0..0..0..1..0..0

..0..0..1..0..0..0....0..0..0..0..0..0....0..1..0..1..0..0....1..0..1..0..0..0

CROSSREFS

Cf. A260609

Sequence in context: A192791 A235886 A261191 * A234921 A199807 A199810

Adjacent sequences:  A260598 A260599 A260600 * A260602 A260603 A260604

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 29 2015

STATUS

approved

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Last modified September 26 11:57 EDT 2020. Contains 337371 sequences. (Running on oeis4.)