75293843625domain: NAppears in sequencesa(n) = (2*n+7)!!/7!!, related to A001147 (odd double factorials).at n=9A051581a(n) = product of next n even numbers beginning with n if n is even, otherwise product of next n odd numbers beginning with n.at n=8A113551a(n) = (2*n+1)!! / ((floor((n-1)/3)*2+1))!!at n=12A220747