Numbers k such that there exists i >= 1 such that k divides 3^3^i - 1.

Terms

a(0) =1a(1) =2a(2) =13a(3) =26a(4) =109a(5) =218a(6) =433a(7) =757a(8) =866a(9) =1417a(10) =1514a(11) =2834a(12) =3889a(13) =5629a(14) =7778a(15) =8209a(16) =9841a(17) =11258a(18) =16418a(19) =17497a(20) =19682a(21) =34994a(22) =47197a(23) =50557a(24) =52489a(25) =58321a(26) =70957a(27) =82513a(28) =94394a(29) =101114