1021870080domain: NAppears in sequencesa(0) = 1; for n > 0, a(n) = (prime(n)-1)*a(n-1).at n=10A005867Triangle of coefficients of x^2 in the Neumann polynomials.at n=37A057869G.f.: Sum_{n>=0} (2*n+1)^n * x^n / (1 + (2*n+1)*x)^n.at n=9A187735