A209529 - OEIS

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

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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