Strong pseudoprimes to base 90.

Terms

a(0) =91a(1) =1001a(2) =1729a(3) =2413a(4) =6281a(5) =8321a(6) =8401a(7) =11557a(8) =13333a(9) =14701a(10) =19951a(11) =24641a(12) =36661a(13) =40501a(14) =47611a(15) =48241a(16) =51961a(17) =56077a(18) =58969a(19) =60701a(20) =61579a(21) =68251a(22) =68401a(23) =78409a(24) =79003a(25) =87673a(26) =97921a(27) =104143a(28) =113641a(29) =128143