Nonsquarefree integers m such that, for prime p, if p^k | m then 1+p^k | 1+m.

Terms

a(0) =26999a(1) =122499a(2) =193599a(3) =599975a(4) =2206775a(5) =2620175a(6) =3501575a(7) =4798079a(8) =8278599a(9) =11631059a(10) =14242175a(11) =16956575a(12) =17578799a(13) =19048799a(14) =49061375a(15) =55504175a(16) =57354725a(17) =70963775a(18) =75271559a(19) =107499699a(20) =114930639a(21) =153536525a(22) =165887189a(23) =202729175a(24) =241430399a(25) =248688719a(26) =257552735a(27) =258969887a(28) =275089919