A109721 Number of different ways of selecting n nonempty cells in a 4 X 4 binary matrix, excluding all rotationally and symmetrically equivalent matrices.

1, 3, 21, 77, 252, 567, 1051, 1465, 1674, 1465, 1051, 567, 252, 77, 21, 3, 1

Offset

0,2

Links

Table of n, a(n) for n=0..16.

Crossrefs

A row of A054252.

Sequence in context: A228317 A322228 A368046 * A067002 A110450 A176646

Adjacent sequences: A109718 A109719 A109720 * A109722 A109723 A109724

Keyword

nonn,fini,full

Author

Philippe Beaudoin, Aug 09 2005

Status

approved