485357

Appears in sequences

• Composite numbers which contain their largest proper divisor as a substring.at n=18A062238
• Pentagonal numbers (A000326) that are also brilliant numbers (A078972).at n=27A113941
• Semiprimes of the form (4*n + 1)*(6*n + 1) = 24*n^2 + 10*n + 1.at n=20A255584
• a(n) is the smallest k such that the p-rank of (Z/kZ)* is 2, where p = prime(n) and (Z/kZ)* is the multiplicative group of integers modulo n.at n=19A307434