693241

Appears in sequences

• The products k of two distinct primes such that 2*k-1, 4*k-3, 8*k-7, 16*k-15, 32*k-31, 64*k-63, 128*k-127 and 256*k-255 are also products of two distinct primes.at n=23A177217
• Starting from 1, successively take the smallest "Choix de Bruxelles" with factor 13 which is not already in the sequence.at n=22A360190