Numbers whose divisors have the form m^k + 1, k>1.

Terms

a(0) =1a(1) =2a(2) =5a(3) =10a(4) =17a(5) =37a(6) =101a(7) =197a(8) =257a(9) =401a(10) =577a(11) =677a(12) =1297a(13) =1601a(14) =2917a(15) =3137a(16) =4357a(17) =5477a(18) =7057a(19) =8101a(20) =8837a(21) =12101a(22) =13457a(23) =14401a(24) =15377a(25) =15877a(26) =16901a(27) =17957a(28) =21317a(29) =22501