Integers k such that (k-1)^3 + 1 is a Fermat pseudoprime to base 2 (A001567).

Terms

a(0) =13a(1) =37a(2) =139a(3) =271a(4) =547a(5) =4801a(6) =7561a(7) =12841a(8) =14701a(9) =358201a(10) =678481a(11) =16139971a(12) =22934101a(13) =55058581a(14) =59553721a(15) =74371321a(16) =113068381a(17) =116605861a(18) =242699311a(19) =997521211a(20) =1592680321a(21) =1652749201a(22) =3190927741a(23) =5088964801a(24) =6974736757a(25) =9214178821