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A222320
Number of open Skolem sequences of order n.
0
1, 2, 4, 8, 20, 52, 146, 430, 1306, 4176, 13832, 47452, 169044, 619672, 234225
OFFSET
1,2
LINKS
S. Burrill and L. Yen, Constructing Skolem sequences via generating trees, arXiv preprint arXiv:1301.6424, 2013
CROSSREFS
Cf. A004075.
Sequence in context: A115219 A078160 A218088 * A089976 A000980 A123611
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Feb 18 2013
STATUS
approved