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A259289 Number of (n+1)X(n+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0001 0101 or 0111 0
10, 94, 1460, 43870, 2293928, 224879224, 39630793526, 12907069546270, 7658473109336548, 8358931948086081568, 16708747158923511120478, 61372969404995540219424992, 413745383754977580838956886918 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A259297

LINKS

Table of n, a(n) for n=1..13.

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Cf. A259297

Sequence in context: A125422 A190988 A287830 * A163738 A190987 A233738

Adjacent sequences:  A259286 A259287 A259288 * A259290 A259291 A259292

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 23 2015

STATUS

approved

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Last modified May 24 07:35 EDT 2022. Contains 354005 sequences. (Running on oeis4.)