Numbers k that divide the 3k-th Clausen number.

Terms

a(0) =1a(1) =2a(2) =6a(3) =14a(4) =42a(5) =114a(6) =602a(7) =798a(8) =1806a(9) =5334a(10) =34314a(11) =101346a(12) =229362a(13) =4357878a(14) =9786714a(15) =12198858a(16) =168241542a(17) =185947566a(18) =231778302a(19) =524550894