Number of open Skolem sequences of order n.

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =20a(5) =52a(6) =146a(7) =430a(8) =1306a(9) =4176a(10) =13832a(11) =47452a(12) =169044a(13) =619672a(14) =234225