99180domain: NAppears in sequencesa(n) = (2^(n-1)/(2n)!)*Product_{k=1..n} q(k) where q(n) is the denominator of B(2n), the 2n-th Bernoulli number.at n=27A069267Numbers k such that k plus the sum of the fifth powers of the digits of k is a cube.at n=13A341286