64639

Appears in sequences

• The least number s > 1 having exactly n fives in the periodic part of the continued fraction of sqrt(s).at n=15A206585
• Numbers n such that the digital sum of n is the same as the digital sum of n^2 in both base 2 and base 10.at n=30A261640
• Composite numbers k such that k-1 divides 2^k-2.at n=39A330382