A235215 Number of (n+1) X (n+1) 0..2 arrays with 2 X 2 edge jumps all no more than +1 in one of the clockwise or counterclockwise directions or both.

59, 8029, 6630699, 35761397619, 1222451522196205, 267555894782142697275, 373708297219003416790462043, 3334468644960359597058491153983041, 190004558530774251991615316633649329710105, 69148641089149950191139000780789280353138692016715, 160721632844195544308052369433378709545204496031494923984741

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..11

Example

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

Crossrefs

Diagonal of A235223.

Sequence in context: A198509 A258269 A094489 * A390875 A178066 A191947

Adjacent sequences: A235212 A235213 A235214 * A235216 A235217 A235218

Keyword

nonn

Author

R. H. Hardin, Jan 05 2014

Status

approved