Odd composite numbers k for which k = A140607((k-1)/2).

Terms

a(0) =91a(1) =1581a(2) =2465a(3) =8481a(4) =25761a(5) =31609a(6) =33355a(7) =34945a(8) =118405a(9) =146611a(10) =319507a(11) =736291a(12) =994507a(13) =3270403a(14) =3375487a(15) =5176153a(16) =6186403a(17) =6228685a(18) =8650951a(19) =10679131a(20) =22028203a(21) =26017291a(22) =31470211a(23) =33796531a(24) =41710411a(25) =42149971a(26) =42474547a(27) =46672291a(28) =48316969a(29) =49019851