Strong pseudoprimes to base 61.

Terms

a(0) =15a(1) =217a(2) =341a(3) =1261a(4) =2701a(5) =3661a(6) =6541a(7) =6697a(8) =7613a(9) =13213a(10) =16213a(11) =22177a(12) =23653a(13) =23959a(14) =31417a(15) =50117a(16) =61777a(17) =63139a(18) =67721a(19) =76301a(20) =77421a(21) =79381a(22) =80041a(23) =102341a(24) =113491a(25) =115231a(26) =145993a(27) =160147a(28) =163073a(29) =164737