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A259420
Number of (n+1)X(n+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0001 0011 or 0111
1
13, 243, 12953, 1990133, 873754597, 1101527291223, 3975872829274865, 41147590225188806309, 1220087829652769318601383, 103689338398592714772850061461, 25251868912730969096083539641411367
OFFSET
1,1
COMMENTS
Diagonal of A259427
LINKS
EXAMPLE
Some solutions for n=3
..1..1..1..1....0..0..0..0....0..0..1..1....0..0..1..1....1..1..1..0
..0..0..0..0....1..0..0..1....0..0..0..0....0..0..1..0....1..0..1..0
..0..0..1..0....0..0..1..1....1..1..1..0....0..0..1..1....1..0..1..1
..1..1..1..1....0..0..0..1....1..0..1..0....1..0..0..0....1..1..1..0
CROSSREFS
Sequence in context: A157969 A218229 A020520 * A203156 A049665 A196665
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 26 2015
STATUS
approved