The On-Line Encyclopedia of Integer Sequences (OEIS)

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A048142

Number of symmetrical planar partitions of n: planar partitions (A000219) that when regarded as 3-D objects have only a threefold axis of symmetry, i.e., C3 symmetry.
(history; published version)

#11 by Jon E. Schoenfield at Thu Aug 03 01:36:25 EDT 2017

STATUS

editing

approved

#10 by Jon E. Schoenfield at Thu Aug 03 01:36:20 EDT 2017

NAME

Number of symmetrical planar partitions of n: planar partitions (A000219) that when regarded as 3-D objects have only a threefold axis of symmetry, i.e. , C3 symmetry.

LINKS

Wouter Meeussen, <a href="/A048142/b048142.txt">Table of n, a(n) for n = 1..151</a>

CROSSREFS

Cf. A000219, A000784, A000785, A000786, A000219, A005987, A048141, A051056-A051061, A096419.

STATUS

approved

editing

#9 by Russ Cox at Fri Mar 30 18:37:41 EDT 2012

AUTHOR

Wouter Meeussen (wouter.meeussen(AT)pandora.be)

Wouter Meeussen

Discussion

Fri Mar 30

18:37

OEIS Server: https://oeis.org/edit/global/214

#8 by N. J. A. Sloane at Thu Nov 11 07:34:06 EST 2010

LINKS

Wouter Meeussen, <a href="/A048142/b048142.txt">Table of n, a(n) for n=1..151</a>

KEYWORD

nice,nonn,new

#7 by N. J. A. Sloane at Fri Feb 27 03:00:00 EST 2009

LINKS

Wouter Meeussen, <a href="http://www.research.att.com/~njas/sequences/b048142.txt">Table of n, a(n) for n=1..151</a>

KEYWORD

nice,nonn,new

#6 by N. J. A. Sloane at Sat Nov 10 03:00:00 EST 2007

NAME

Symmetrical Number of symmetrical planar partitions of n: planar partitions (A000219) that when regarded as 3-D objects have only a threefold axis of symmetry, i.e. C3 symmetry).

EXAMPLE

The plane partitions {{3, 2, 2}, {3, 1}, {1, 1}} and {{3, 2, 2}, {3, 2}, {1, 1}} have C3 symmetry.

KEYWORD

nice,nonn,new

#5 by N. J. A. Sloane at Fri May 11 03:00:00 EDT 2007

LINKS

Wouter Meeussen, <a href="http://www.research.att.com/~njas/sequences/b048142.txt">Table of n, a(n) for n=1..151</a>

KEYWORD

nice,nonn,new

#4 by N. J. A. Sloane at Fri May 19 03:00:00 EDT 2006

CROSSREFS

Cf. A000784, A000785, A000786, A000219, A005987, A048141, A051056-A051061, A096419.

KEYWORD

nice,nonn,new

#3 by N. J. A. Sloane at Sun Feb 20 03:00:00 EST 2005

KEYWORD

nice,nonn,new

AUTHOR

Wouter Meeussen (wwouter.meeussen.vdmcc(AT)vandemoortelepandora.be)

#2 by N. J. A. Sloane at Fri May 16 03:00:00 EDT 2003

KEYWORD

nice,nonn,new

AUTHOR

Wouter Meeussen (w.meeussen.vdmcc@(AT)vandemoortele.be)