id:A059221 - OEIS Search Results

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Number of 3-bead necklaces where each bead is an unlabeled rooted tree, by total number of nodes.

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1, 1, 2, 4, 8, 18, 43, 103, 255, 642, 1640, 4242, 11096, 29278, 77882, 208589, 562056, 1522606, 4144521, 11329608, 31090910, 85618848, 236530942, 655344579, 1820585313, 5070138554, 14151907583, 39584395796, 110938500821, 311481097178 (list; graph; listen)

	OFFSET	`0,3`
	CROSSREFS	`See A058855 (the 6-bead analogue) for details.` `Sequence in context: A024428 A049075 A052327 this_sequence A114203 A100132 A088457` `Adjacent sequences: A059218 A059219 A059220 this_sequence A059222 A059223 A059224`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Jan 18 2001`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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