Strong pseudoprimes to base 27.

Terms

a(0) =121a(1) =133a(2) =259a(3) =365a(4) =703a(5) =1649a(6) =1891a(7) =3281a(8) =4921a(9) =5461a(10) =8401a(11) =8911a(12) =9809a(13) =9841a(14) =9881a(15) =10585a(16) =12403a(17) =13019a(18) =13073a(19) =13333a(20) =16531a(21) =18721a(22) =19345a(23) =21901a(24) =23521a(25) =26467a(26) =26599a(27) =29891a(28) =31621a(29) =35371