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A259954 Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00001001 1
34, 146, 1603, 22622, 501606, 17818241, 949570630, 77682624194, 9896025788402, 1940408456200141, 584639553275100018, 271649247842334658120, 194639319999547441935265, 214876443861835390451767918 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A259962

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..15

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A259962

Sequence in context: A105714 A072319 A031398 * A180759 A159744 A192398

Adjacent sequences:  A259951 A259952 A259953 * A259955 A259956 A259957

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 10 2015

STATUS

approved

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Last modified June 21 14:56 EDT 2021. Contains 345364 sequences. (Running on oeis4.)