Indices n such that A307672(2*n) = 2.

Terms

a(0) =1a(1) =3a(2) =4a(3) =7a(4) =9a(5) =11a(6) =12a(7) =13a(8) =19a(9) =21a(10) =22a(11) =25a(12) =27a(13) =29a(14) =32a(15) =33a(16) =34a(17) =36a(18) =38a(19) =39a(20) =40a(21) =46a(22) =55a(23) =57a(24) =58a(25) =61a(26) =63a(27) =65a(28) =66a(29) =67