Strong pseudoprimes to base 74.

Terms

a(0) =15a(1) =25a(2) =75a(3) =91a(4) =427a(5) =511a(6) =793a(7) =949a(8) =1387a(9) =1729a(10) =4453a(11) =4577a(12) =5551a(13) =6541a(14) =6643a(15) =7421a(16) =13333a(17) =13747a(18) =14295a(19) =15067a(20) =15135a(21) =27613a(22) =31171a(23) =38503a(24) =45025a(25) =55831a(26) =57889a(27) =76177a(28) =88357a(29) =88831