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A209905
Half the number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having two or four distinct clockwise edge differences
0
62, 13098, 16664508, 135833193008, 6954596004028468, 2253166071062026531552, 4605826850905941430535864352, 59470527831535893681344131012059952
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A209913
LINKS
Table of n, a(n) for n=1..8.
EXAMPLE
Some solutions for n=4
..0..2..2..1..0....3..0..3..3..0....1..0..0..0..0....3..0..0..1..1
..3..3..0..2..3....0..3..0..1..3....3..1..3..1..3....1..3..1..3..0
..0..1..3..3..2....1..0..1..0..1....1..3..1..3..0....0..0..3..1..1
..3..1..0..1..3....1..3..3..2..3....1..0..3..0..1....3..1..0..0..3
..3..0..1..3..1....2..1..0..0..3....0..1..1..0..3....0..3..3..2..2
CROSSREFS
Sequence in context: A123806 A233340 A299826 * A227357 A093262 A159374
Adjacent sequences: A209902 A209903 A209904 * A209906 A209907 A209908
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 15 2012
STATUS
approved

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Last modified October 5 10:30 EDT 2024. Contains 376540 sequences.
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