id:A008986 - OEIS Search Results

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Number of immersions of oriented circle into oriented sphere with n double points.

+0
1

1, 1, 3, 9, 37, 182, 1143, 7553 (list; graph; listen)

	OFFSET	`0,3`
	REFERENCES	`V. I. Arnold, Topological Invariants of Plane Curves..., American Math. Soc., 1994, p. 18.`
	CROSSREFS	`Sequence in context: A119856 A077365 A006229 this_sequence A105215 A009179 A030819` `Adjacent sequences: A008983 A008984 A008985 this_sequence A008987 A008988 A008989`
	KEYWORD	`nonn`
	AUTHOR	`njas`
	EXTENSIONS	`Two more terms from Guy H. Valette (guy.valette(AT)skynet.be), Feb 09 2004`

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.