id:A003241 - OEIS Search Results

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Number of achiral rooted trees.
(Formerly M1101)

+0
1

1, 1, 2, 4, 8, 15, 26, 45, 71, 110, 168, 247 (list; graph; listen)

	OFFSET	`1,3`
	REFERENCES	`N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).` `F. Harary and R. W. Robinson, The number of achiral trees, J. Reine Angew. Math., 278 (1975), 322-335.`
	LINKS	`Index entries for sequences related to rooted trees` `Index entries for sequences related to trees`
	CROSSREFS	`Sequence in context: A129961 A133551 A114226 this_sequence A125513 A054174 A001523` `Adjacent sequences: A003238 A003239 A003240 this_sequence A003242 A003243 A003244`
	KEYWORD	`nonn,more`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified November 22 20:51 EST 2009. Contains 167312 sequences.