28493

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 77.at n=31A020416
• Discriminants of real quadratic fields with class number 1 and related continued fraction period length of 21.at n=28A051962
• Least k such that the longest palindromic substring (without leading zeros) contained in 2^k has length n.at n=15A052059
• a(n) is the numerator of the n-th convergent of [L_1, L_2, L_3, ...] where L_i is the period of the continued fraction for sqrt(i).at n=14A053190
• Primes which are the sum of three distinct positive cubes in two or more distinct ways.at n=26A180088
• Integer k associated with the conjectured record-breaking maximal element A226667(n) of primitive Collatz-like 3x+k cycles.at n=9A226668
• a(n) is the total number of all winning moves for all partitions of n which represent Chomp positions.at n=35A284686
• Beginning with 13, least prime such that concatenation of first n terms and its digit reversal both are primes.at n=28A382898
• Prime numbersat n=3099