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Revision History for A109721

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Number of different ways of selecting n nonempty cells in a 4 X 4 binary matrix, excluding all rotationally and symmetrically equivalent matrices.
(history; published version)

#8 by Jon E. Schoenfield at Sun Dec 13 17:40:38 EST 2015

STATUS

editing

approved

#7 by Jon E. Schoenfield at Sun Dec 13 17:40:36 EST 2015

NAME

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

STATUS

approved

editing

#6 by Joerg Arndt at Sun Oct 13 04:45:13 EDT 2013

STATUS

proposed

approved

#5 by Jon E. Schoenfield at Sun Oct 13 04:09:02 EDT 2013

STATUS

editing

proposed

#4 by Jon E. Schoenfield at Sun Oct 13 04:08:53 EDT 2013

AUTHOR

_Philippe Beaudoin (beaudoin(AT)iro.umontreal.ca), _, Aug 09 2005

STATUS

approved

editing

#3 by Charles R Greathouse IV at Mon Feb 21 11:37:51 EST 2011

STATUS

proposed

approved

#2 by Omar E. Pol at Mon Feb 21 11:33:25 EST 2011

NAME

Number of different ways of selecting n non-empty cells in a 4 X 4 binary matrix, excluding all rotationally and symetrically symmetrically equivalent matrices.

STATUS

approved

proposed

#1 by N. J. A. Sloane at Wed Sep 21 03:00:00 EDT 2005

NAME

Number of different ways of selecting n non-empty cells in a 4 X 4 binary matrix, excluding all rotationally and symetrically equivalent matrices.

DATA

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

OFFSET

0,2

CROSSREFS

A row of A054252.

KEYWORD

nonn,fini,full

AUTHOR

Philippe Beaudoin (beaudoin(AT)iro.umontreal.ca), Aug 09 2005

STATUS

approved