id:A048141 - OEIS Search Results

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Number of symmetrical planar partitions of n: planar partitions (A000219) that when regarded as 3-D objects have a threefold axis of symmetry that is the intersection of 3 mirror planes, i.e. C3v symmetry.

+0
13

1, 0, 0, 1, 0, 0, 2, 1, 0, 2, 1, 0, 2, 1, 0, 3, 2, 0, 4, 4, 0, 4, 5, 0, 5, 7, 1, 6, 9, 1, 6, 11, 1, 8, 15, 2, 10, 20, 3, 10, 25, 4, 12, 33, 7, 14, 40, 9, 15, 48, 12, 18, 60, 17, 20, 74, 23, 22, 89, 30, 26, 108, 40, 30, 130, 51, 33, 157, 66, 37, 187, 85, 42, 222, 108, 47, 262, 136, 54 (list; graph; listen)

	OFFSET	`1,7`
	LINKS	`Wouter Meeussen, Table of n, a(n) for n=1..151`
	EXAMPLE	`The plane partition {{2,1},{1}} has C3v symmetry.`
	CROSSREFS	`Cf. A000784, A000785, A000786, A000219, A005987, A048142, A051056-A051061, A096419.` `Sequence in context: A112203 A132798 A080425 this_sequence A025664 A025854 A025857` `Adjacent sequences: A048138 A048139 A048140 this_sequence A048142 A048143 A048144`
	KEYWORD	`nice,nonn`
	AUTHOR	`Wouter Meeussen (wouter.meeussen(AT)pandora.be)`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research