Numbers k in A001597 such that 2*k + 1 is prime.

Terms

a(0) =1a(1) =8a(2) =9a(3) =36a(4) =81a(5) =125a(6) =128a(7) =216a(8) =243a(9) =441a(10) =576a(11) =729a(12) =900a(13) =1089a(14) =1296a(15) =1331a(16) =1728a(17) =1764a(18) =2025a(19) =4356a(20) =5184a(21) =5625a(22) =7569a(23) =8000a(24) =8649a(25) =9216a(26) =9261a(27) =9801a(28) =10404a(29) =11025