20134

Appears in sequences

• Positive numbers k such that k and 2*k are anagrams in base 6 (written in base 6).at n=18A023064
• Numbers whose set of base-11 digits is {1,4}.at n=41A032823
• Round(1000*x), where x is the solution to x = 5^(n-x).at n=22A104744
• Number of binary strings of length n that avoid the pattern x x^R x (x^R is the reversal of x).at n=31A261204
• Composite numbers k such that phi(x) = psi(k)*phi(k) has no solution.at n=15A292714
• a(1) = 1; a(n+1) = Sum_{d|n, n/d odd} a(d)^(n/d).at n=42A307780
• Expansion of the continued fraction 1 / (1-q / (1-q-q^3 / (1-q-q^3-q^5 / (1-q-q^3-q^5-q^7 / (...))))).at n=13A355046