188985961

Appears in sequences

• Pseudoprimes to bases 2,3,5 and 7 which are not Carmichael numbers (A002997).at n=16A153581
• a(n) is the smallest odd composite k such that prime(n)^((k-1)/2) == -1 (mod k) and b^((k-1)/2) == 1 (mod k) for every natural b < prime(n).at n=3A309284