A183643 Number of (n+1)X(n+1) 0..4 arrays with every 2X2 subblock summing to 8

85, 1001, 10213, 97145, 889525, 7969001

Offset

1,1

Comments

Diagonal of A183652

Links

Table of n, a(n) for n=1..6.

Example

Some solutions for 3X3
..3..2..1....2..1..0....1..3..0....2..0..4....2..1..2....3..2..2....3..2..3
..2..1..4....2..3..4....3..1..4....4..2..2....2..3..2....0..3..1....0..3..0
..2..3..0....2..1..0....1..3..0....1..1..3....2..1..2....1..4..0....2..3..2

Crossrefs

Sequence in context: A202009 A194533 A069308 * A206163 A020239 A297587

Adjacent sequences: A183640 A183641 A183642 * A183644 A183645 A183646

Keyword

nonn

Author

R. H. Hardin Jan 06 2011

Status

approved