id:A094818 - OEIS Search Results

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Number of classes of dp-homogeneous spherical curves with n double points.

+0
1

1, 1, 2, 2, 4, 2, 2, 2, 4, 2, 3, 2, 3, 2, 3, 2, 4, 2, 2, 2, 4, 2, 3, 2, 3, 2, 3, 2, 4, 2, 2, 2, 4, 2, 3, 2, 3, 2, 3, 2, 4, 2, 2, 2, 4, 2, 3, 2, 3, 2, 3, 2, 4, 2, 2, 2, 4, 2, 3, 2, 3, 2, 3, 2, 4, 2, 2, 2, 4, 2, 3, 2, 3, 2, 3, 2, 4, 2, 2, 2, 4, 2, 3, 2, 3, 2, 3, 2, 4, 2, 2, 2, 4, 2, 3, 2, 3, 2, 3, 2, 4, 2, 2, 2, 4 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`A spherical curve C is said to be dp-homogeneous if the stability group of C in the group of diffeomorphisms of the sphere acts transitively on the set of double points of C. Two spherical curves belongs to the same class if there is a diffeomorphism of the sphere sending the first curve onto the second one.`
	REFERENCES	`G. Valette, A classification of spherical curves, preprint, 2004`
	FORMULA	`If n>14, then a(n) = a(n-12).`
	CROSSREFS	`Adjacent sequences: A094815 A094816 A094817 this_sequence A094819 A094820 A094821` `Sequence in context: A021450 A092188 A097884 this_sequence A114233 A063086 A077636`
	KEYWORD	`nonn`
	AUTHOR	`Guy H. Valette (guy.valette(AT)skynet.be), Jun 12 2004`
	EXTENSIONS	`More terms from David Wasserman (dwasserm(AT)earthlink.net), Jun 29 2007`

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Last modified October 13 09:05 EDT 2008. Contains 145008 sequences.

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