459281domain: NAppears in sequencesa(n) is the smallest number k such that four consecutive prime numbers prime(n), prime(n+1), prime(n+2) and prime(n+3) are divisors of k, k+1, k+2 and k+3 respectively.at n=11A180096E.g.f. satisfies: A(x) = Sum_{n>=0} A(2^n*x)^n * x^n/n!.at n=5A192055