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A289655
Subset of A008989 containing one or more simple loops.
0
0, 1, 2, 5, 18, 74, 371, 2178
OFFSET
0,3
COMMENTS
It appears (although it is not certain) that A268571(n) = A008989(n) - a(n).
LINKS
Guy Valette, A Classification of Spherical Curves Based on Gauss Diagrams, Arnold Math. J. (2016) 2:383-405, DOI 10.1007/s40598-016-0049-3.
CROSSREFS
Sequence in context: A344262 A352985 A319121 * A189281 A006848 A208968
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Jul 17 2017
STATUS
approved