Strong pseudoprimes to base 3.

Terms

a(0) =121a(1) =703a(2) =1891a(3) =3281a(4) =8401a(5) =8911a(6) =10585a(7) =12403a(8) =16531a(9) =18721a(10) =19345a(11) =23521a(12) =31621a(13) =44287a(14) =47197a(15) =55969a(16) =63139a(17) =74593a(18) =79003a(19) =82513a(20) =87913a(21) =88573a(22) =97567a(23) =105163a(24) =111361a(25) =112141a(26) =148417a(27) =152551a(28) =182527a(29) =188191