Primes p such that p*(p-2) divides 3^(p-1)-1.

Terms

a(0) =37a(1) =457a(2) =1297a(3) =2557a(4) =4357a(5) =6481a(6) =8689a(7) =11953a(8) =14401a(9) =26497a(10) =33931a(11) =44101a(12) =47521a(13) =47881a(14) =90631a(15) =141157a(16) =157081a(17) =165601a(18) =206221a(19) =225457a(20) =304081a(21) =366097a(22) =384049a(23) =427351a(24) =446881a(25) =560737a(26) =576721a(27) =589591a(28) =636781a(29) =677041