53877

Appears in sequences

• a(n) = 2^n * (n^4 - 4*n^3 + 18*n^2 - 52*n + 75) - 75.at n=6A209359
• Semiprimes of the form p^2 + pq + q^2, where p, q are consecutive primes.at n=17A243904
• a(n) = A273059(4n+3).at n=40A275919