a(n) = smallest composite c such that n^(A000010(c)) == 1 (mod c^2), i.e., smallest composite Wieferich number to base n.
A247154
a(n) = smallest composite c such that n^(A000010(c)) == 1 (mod c^2), i.e., smallest composite Wieferich number to base n.
Terms
- a(0) =4a(1) =3279a(2) =22a(3) =3279a(4) =41542a(5) =330805a(6) =4a(7) =3279a(8) =4a(9) =1461a(10) =142a(11) =1812389a(12) =1726a(13) =3883a(14) =4a(15) =3279a(16) =4a(17) =35a(18) =6a(19) =1967
External references
- oeis: A247154