Numbers k such that binomial(k, 3) divides binomial(3^k-3, 2).

Terms

a(0) =3a(1) =5a(2) =17a(3) =37a(4) =79a(5) =101a(6) =257a(7) =14401a(8) =44101a(9) =47881a(10) =57601a(11) =65537a(12) =677041a(13) =1354081a(14) =2031121a(15) =3766141a(16) =7812169a(17) =8122501a(18) =17907121a(19) =18671941a(20) =19676161a(21) =21381361a(22) =29615041a(23) =30115009a(24) =65246161a(25) =105557761a(26) =144406081a(27) =181254529a(28) =217039681a(29) =242235841