131816

Appears in sequences

• Primonacci numbers: a(n)=a(n-2)+a(n-3)+a(n-5)+a(n-7)+a(n-11)+...+a(n-p(k))+... until n <= p(k), where p(k) is the k-th prime. a(1)=a(2)=1.at n=32A078465
• Numerators of partial sums of (p+q)/p*q, where p and q are primes.at n=12A120831