19331

Appears in sequences

• a(n) = (2*n^3 + 5*n^2 + 5*n)/2.at n=25A162267
• Odd semiprimes k = p*q such that k = A325820(p,q), with p, q primes > 3, and A325820 is the carryless base-3 multiplication.at n=46A391331