Pseudoprimes to base 61.

Terms

a(0) =4a(1) =6a(2) =10a(3) =12a(4) =15a(5) =20a(6) =30a(7) =52a(8) =60a(9) =91a(10) =93a(11) =130a(12) =155a(13) =190a(14) =217a(15) =341a(16) =388a(17) =403a(18) =465a(19) =561a(20) =679a(21) =786a(22) =970a(23) =1105a(24) =1261a(25) =1441a(26) =1729a(27) =2388a(28) =2465a(29) =2701