A184770 Number of (n+1)X7 0..3 arrays with every 2X2 subblock singular

417256, 454774672, 39939558160, 18492329456080, 3063406967117776, 1004331937875999952, 225203116583181557968, 65125066574894542587856, 16551036919295881635106768, 4596125898531178643947012816

Offset

1,1

Comments

Column 6 of A184773

Links

R. H. Hardin, Table of n, a(n) for n = 1..100

Example

Some solutions for 3X7
..0..0..0..0..0..0..3....0..0..0..2..2..2..0....0..0..0..1..1..2..2
..0..0..0..2..2..0..3....0..0..0..0..0..0..0....0..0..0..0..0..0..0
..0..0..0..2..2..0..0....0..0..0..1..3..0..3....0..0..0..1..2..2..1

Crossrefs

Sequence in context: A251960 A234663 A183591 * A236909 A104920 A151838

Adjacent sequences: A184767 A184768 A184769 * A184771 A184772 A184773

Keyword

nonn

Author

R. H. Hardin Jan 21 2011

Status

approved