91860

Appears in sequences

• Numbers k such that sigma(k) mod pi(k) = 1.at n=21A073723
• a(n) = number of steps in all Delannoy paths of length n.at n=6A109984
• Absolute discriminants of complex quadratic fields with 3-class group of type (3,3) and 3-principalization type (2241).at n=38A247689