20653

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 74 ones.at n=26A031842
• Schoenheim bound L_1(n,6,5).at n=23A036833
• Denominators of continued fraction convergents to sqrt(379).at n=7A041719
• Integers k such that the k-th triangular number t_k has all its base-12 digits contained in {1,5,7,11}.at n=9A118711
• Number of (n+3) X 10 0..2 matrices with each 4 X 4 subblock idempotent.at n=9A224727
• Numbers n such that (n-1)^3 + (n+1)^3 is a taxi-cab number (A001235).at n=39A272910