66025

Appears in sequences

• a(n) = 49n^2 - 28n - 20.at n=36A118058
• Numbers k such that 2^(2*k - 1) - 1 is prime.at n=28A138576
• a(n) = n*(n + 1)*(11*n^2 + 11*n - 10)/24.at n=19A264854