id:A014591 - OEIS Search Results

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Floor(n^2/12+5/4).

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1, 1, 1, 2, 2, 3, 4, 5, 6, 8, 9, 11, 13, 15, 17, 20, 22, 25, 28, 31, 34, 38, 41, 45, 49, 53, 57, 62, 66, 71, 76, 81, 86, 92, 97, 103, 109, 115, 121, 128, 134, 141, 148, 155, 162, 170, 177, 185, 193, 201, 209, 218, 226, 235, 244, 253, 262, 272, 281, 291, 301, 311, 321 (list; graph; listen)

	OFFSET	`0,4`
	LINKS	`Jan Kneissler, The number of primitive Vassiliev invariants of degree up to 12`
	FORMULA	`G.f.: (1/(1-x^3)-x^2)/(1-x)/(1-x^2).`
	CROSSREFS	`It may be only a coincidence that the first 11 terms reproduce all available data on Vassiliev invariants from diagrams with u=2 univalent vertices, as recorded in the Kneissler paper.` `Sequence in context: A061052 A088670 A091581 this_sequence A027198 A027197 A137793` `Adjacent sequences: A014588 A014589 A014590 this_sequence A014592 A014593 A014594`
	KEYWORD	`nonn,easy`
	AUTHOR	`David Broadhurst (D.Broadhurst(AT)open.ac.uk)`
	EXTENSIONS	`More terms from Erich Friedman (erich.friedman(AT)stetson.edu).`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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