38614domain: NAppears in sequencesa(n) = p(1)p(n) + p(2)p(n-1) + ... + p(k)p(n-k+1), where k = [ n/2 ], p = A000040, the primes.at n=34A025129Numbers whose base-14 representation has exactly 5 runs.at n=1A043666a(n) = (-1)^n + Sum_{k=0..floor((n-1)/2)} a(k) * a(n-2*k-1).at n=35A351973