116731

Properties

Appears in sequences

• Numbers k such that k and k^2 use only the digits 1, 2, 3, 6 and 7.at n=16A136979
• Primes p for which exactly six bases b with 1 < b < p exist such that p is a base b Wieferich prime.at n=6A255209
• a(n) = Sum_{k=1..n} k^2 * floor(n/k)^3.at n=32A350124
• a(n) = 9*A006190(n)+1.at n=9A352180
• Prime numbersat n=11021