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A109721 Number of different ways of selecting n nonempty cells in a 4 X 4 binary matrix, excluding all rotationally and symmetrically equivalent matrices. 0
1, 3, 21, 77, 252, 567, 1051, 1465, 1674, 1465, 1051, 567, 252, 77, 21, 3, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

CROSSREFS

A row of A054252.

Sequence in context: A054646 A228317 A322228 * A067002 A110450 A176646

Adjacent sequences: A109718 A109719 A109720 * A109722 A109723 A109724

KEYWORD

nonn,fini,full

AUTHOR

Philippe Beaudoin, Aug 09 2005

STATUS

approved

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Last modified February 8 19:25 EST 2023. Contains 360151 sequences. (Running on oeis4.)