594218

Appears in sequences

• Number of 8-element subsets of [n] having a prime element sum.at n=20A320683
• a(0) = a(1) = 0, a(2) = 1; a(n) = a(n-1) + Sum_{k=0..n-3} a(k) * a(n-k-3).at n=31A357308