170905

Appears in sequences

• Expansion of 1/((1-3x)(1-8x)(1-9x)(1-12x)).at n=4A028101
• Numbers of the form m = p1 * p2 * p3 * p4 where for each d|m we have (d+m/d)/2 prime and p1 < p2 < p3 < p4 each prime.at n=25A128285