8304721920domain: NAppears in sequencesa(n) = binomial(n + 4, 4) * 8^n.at n=8A172510Consider the Post tag system defined in A284116; a(n) = number of binary words of length n which terminate at the empty word.at n=34A289670a(n) = 8^n * binomial(n * 3/2, n).at n=8A358367