A209529 Half the number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock having exactly two distinct clockwise edge differences

5, 25, 257, 6145, 262145, 25165825, 4294967297, 1649267441665, 1125899906842625, 1729382256910270465, 4722366482869645213697, 29014219670751100192948225, 316912650057057350374175801345, 7788445287802241442795744493830145

Offset

1,1

Comments

Diagonal of A209534

Links

R. H. Hardin, Table of n, a(n) for n = 1..126

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

Adjacent sequences: A209526 A209527 A209528 * A209530 A209531 A209532

Keyword

nonn

Author

R. H. Hardin Mar 10 2012

Status

approved