A226844 Number of n X n (0,1,2) arrays of permanents of 2X2 subblocks of some (n+1)X(n+1) binary array

3, 71, 4722, 989731, 838184554, 2776144667878, 34196613228139182

Offset

1,1

Comments

Diagonal of A226852

Links

Table of n, a(n) for n=1..7.

Example

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

Crossrefs

Sequence in context: A349072 A272657 A226709 * A300540 A334124 A336441

Adjacent sequences: A226841 A226842 A226843 * A226845 A226846 A226847

Keyword

nonn

Author

R. H. Hardin Jun 19 2013

Status

approved