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A209545 1/4 the number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having exactly two distinct clockwise edge differences 1
7, 105, 5075, 723636, 294738262, 345350598642, 1159953545419801, 11179084602659460822, 309007688117388883362757, 24500703075201459753727015849, 5572033834554753242178727061445290 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A209553
LINKS
EXAMPLE
Some solutions for n=4
..0..2..0..2..0....2..3..0..1..2....2..3..0..1..2....3..0..3..0..3
..2..0..2..0..2....3..2..1..2..1....3..2..1..0..1....0..3..0..3..0
..0..2..0..2..0....2..1..0..1..2....2..1..2..3..2....1..2..1..2..1
..2..0..2..0..2....1..2..1..0..1....3..0..1..2..3....2..3..0..3..2
..0..2..0..2..0....0..1..0..1..0....0..3..2..1..0....3..2..1..2..3
CROSSREFS
Sequence in context: A096131 A049210 A167814 * A002486 A360370 A203971
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 10 2012
STATUS
approved

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Last modified March 19 02:55 EDT 2024. Contains 370952 sequences. (Running on oeis4.)