115620

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 34.at n=19A031712
• Numbers k such that the sum of unitary divisors of k^2 is a square.at n=25A064498
• Numbers k such that 2*k+1, 4*k+1, 8*k+1, 16*k+1 and 32*k+1 are primes.at n=16A124413
• a(n) = 400*n^2 + 20.at n=17A158601