91363

Appears in sequences

• a(n) = [x^n] Product_{k=1..n} (1 + (n - k + 1)*x^k).at n=14A303188
• a(1)=2; thereafter a(n) = a(n-1) + gpf(a(n-1)) - 1, where gpf = greatest prime factor = A006530.at n=38A389408