Composite numbers k which divide A001045(k-1).

Terms

a(0) =341a(1) =1105a(2) =1387a(3) =1729a(4) =2047a(5) =2465a(6) =2701a(7) =2821a(8) =3277a(9) =4033a(10) =4369a(11) =4681a(12) =5461a(13) =6601a(14) =7957a(15) =8321a(16) =8911a(17) =10261a(18) =10585a(19) =11305a(20) =13741a(21) =13747a(22) =13981a(23) =14491a(24) =15709a(25) =15841a(26) =16705a(27) =18721a(28) =19951a(29) =23377