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A107683 Number of perfect Skolem sets. 0
1, 1, 3, 11, 35, 114, 407, 1486, 5414, 19923, 74230, 278462, 1049318, 3972395, 15101658, 57607431, 220391316, 845366406, 3250192681, 12521965697 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..20.

G. Nordh, Perfect Skolem sequences

CROSSREFS

Cf. A004075, A060963, A099152.

Sequence in context: A032637 A034576 A125672 * A259400 A320087 A014335

Adjacent sequences:  A107680 A107681 A107682 * A107684 A107685 A107686

KEYWORD

nonn

AUTHOR

Ralf Stephan, Jun 10 2005

STATUS

approved

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Last modified June 2 10:57 EDT 2020. Contains 334771 sequences. (Running on oeis4.)