251751

Appears in sequences

• a(n) = 6*a(n-1) + 3*(2^(n-2)-1) for n > 2, a(0)=a(1)=a(2)=0.at n=9A241271
• Positive integers j such that prime(i) + prime(j) = i*j for some i <= j.at n=22A272862