A234761 Number of (n+1)X(n+1) 0..3 arrays with 2X2 edge jumps all no more than +1 in one of the clockwise or counterclockwise directions but not both

56, 1624, 71280, 14119456, 3638129496, 5918104318968, 8967685381446696, 122249822533913768232, 1076958448730484588421552, 123150528274584255166922562896

Offset

1,1

Comments

Diagonal of A234769

Links

Table of n, a(n) for n=1..10.

Example

Some solutions for n=3
..0..0..1..3....2..2..2..2....2..2..0..2....1..0..1..0....0..1..3..1
..1..2..1..2....3..1..3..1....0..1..0..1....2..3..2..3....3..2..3..2
..1..0..0..2....2..2..3..2....3..2..2..2....2..1..1..0....1..2..1..2
..2..2..1..1....0..1..3..1....1..1..0..1....2..0..2..0....0..0..0..0

Crossrefs

Sequence in context: A035799 A278362 A017719 * A290607 A258465 A050989

Adjacent sequences: A234758 A234759 A234760 * A234762 A234763 A234764

Keyword

nonn

Author

R. H. Hardin, Dec 30 2013

Status

approved