Strong pseudoprimes to base 56.

Terms

a(0) =55a(1) =57a(2) =247a(3) =1027a(4) =1501a(5) =1705a(6) =1891a(7) =3193a(8) =3277a(9) =5665a(10) =12403a(11) =18721a(12) =19513a(13) =19517a(14) =20329a(15) =38963a(16) =46717a(17) =76049a(18) =79213a(19) =90973a(20) =118301a(21) =128627a(22) =135097a(23) =137299a(24) =144523a(25) =163073a(26) =175615a(27) =188501a(28) =196981a(29) =197633