%I A107683
%S A107683 1,1,3,11,35,114,407,1486,5414,19923,74230,278462,1049318,3972395,
%T A107683 15101658,57607431,220391316,845366406,3250192681,12521965697
%N A107683 Number of perfect Skolem sets.
%H A107683 G. Nordh, <a href="http://arXiv.org/abs/math.NT/0506155">Perfect Skolem 
               sequences</a>
%Y A107683 Cf. A004075, A060963, A099152.
%Y A107683 Sequence in context: A032637 A034576 A125672 this_sequence A014335 A147474 
               A119143
%Y A107683 Adjacent sequences: A107680 A107681 A107682 this_sequence A107684 A107685 
               A107686
%K A107683 nonn
%O A107683 1,3
%A A107683 Ralf Stephan, Jun 10 2005