Numbers b > 1 such that the smallest four primes, i.e., 2, 3, 5 and 7 are base-b Wieferich primes.

Terms

a(0) =557a(1) =901a(2) =1549a(3) =2449a(4) =4049a(5) =5293a(6) =5849a(7) =6193a(8) =7057a(9) =7957a(10) =8801a(11) =9701a(12) =12349a(13) =13249a(14) =14093a(15) =14993a(16) =15857a(17) =16201a(18) =16757a(19) =18001a(20) =19601a(21) =20501a(22) =21149a(23) =21493a(24) =22049a(25) =23257a(26) =23293a(27) =24893a(28) =25057a(29) =25793