21082276215domain: NAppears in sequencesa(n) = (2*n+5)!!/5!!, related to A001147 (odd double factorials).at n=9A051579Products of the first terms of the arithmetic sequence f(n) defined by f(2^k l) = l^{1 - k} (for k a nonnegative integer and l a positive odd integer).at n=22A185275