Pseudoprimes to base 28.

Terms

a(0) =9a(1) =27a(2) =45a(3) =87a(4) =145a(5) =261a(6) =361a(7) =529a(8) =561a(9) =703a(10) =783a(11) =785a(12) =1105a(13) =1305a(14) =1413a(15) =1431a(16) =1885a(17) =2041a(18) =2413a(19) =2465a(20) =2871a(21) =3201a(22) =3277a(23) =4553a(24) =4699a(25) =5149a(26) =5181a(27) =5365a(28) =7065a(29) =8149