245248819200domain: NAppears in sequencesa(n) = (2*n+4)!!/4!!, related to A000165 (even double factorials).at n=10A051578Expansion of e.g.f. x^2*(1-x)/(1-2*x).at n=12A052587Terms of A110142 at positions p(n)+1, where p(n) = A000041(n) is the number of partitions of n; a(n) = A110142(p(n)+1) for n>=1, with a(0) = 1.at n=24A110144