27515

Appears in sequences

• Numbers k such that digit sum of 3^k is a power of 3.at n=33A118872
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 0), (-1, 0, 1), (1, 0, 1), (1, 1, 0)}.at n=8A150376
• Semiprimes that are the sum of the first n odd primes for some n.at n=34A274182
• Odd numbers k such that Sum_{j=1..(k-1)/2, gcd(j,k)=1} 1/j == -2*q_2(k) + k*q_2(k)^2 (mod k^3), where q_2(k) = (2^phi(k) - 1)/k is the Euler quotient of k to base 2.at n=9A329706