login
A209529
Half the number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock having exactly two distinct clockwise edge differences
1
5, 25, 257, 6145, 262145, 25165825, 4294967297, 1649267441665, 1125899906842625, 1729382256910270465, 4722366482869645213697, 29014219670751100192948225, 316912650057057350374175801345, 7788445287802241442795744493830145
OFFSET
1,1
COMMENTS
Diagonal of A209534
LINKS
EXAMPLE
Some solutions for n=4
..0..1..2..1..2....0..1..2..1..2....1..0..1..2..1....1..0..1..2..1
..1..0..1..2..1....1..2..1..2..1....0..1..0..1..2....2..1..0..1..2
..2..1..0..1..2....2..1..2..1..0....1..2..1..0..1....1..2..1..2..1
..1..2..1..2..1....1..2..1..2..1....2..1..0..1..2....2..1..2..1..0
..0..1..0..1..2....0..1..2..1..0....1..0..1..2..1....1..2..1..2..1
CROSSREFS
Sequence in context: A005452 A061839 A143600 * A184958 A145076 A185063
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 10 2012
STATUS
approved