Number of perfect Skolem sets.

Terms

a(0) =1a(1) =1a(2) =3a(3) =11a(4) =35a(5) =114a(6) =407a(7) =1486a(8) =5414a(9) =19923a(10) =74230a(11) =278462a(12) =1049318a(13) =3972395a(14) =15101658a(15) =57607431a(16) =220391316a(17) =845366406a(18) =3250192681a(19) =12521965697