174581domain: NAppears in sequencesa(n) = the smallest multiple of the n-th prime such that (a(n)+1) is divisible by both the (n-1)th prime and the (n+1)st prime.at n=15A143243G.f. A(x) satisfies A(x) = 1/(1 - x*A(2*x)^3).at n=5A171193