a(n) = LCM of pairwise products of distinct integers from {1,2,...,n}.

Terms

a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =120a(6) =360a(7) =2520a(8) =10080a(9) =30240a(10) =151200a(11) =1663200a(12) =1663200a(13) =21621600a(14) =151351200a(15) =151351200a(16) =605404800a(17) =10291881600a(18) =30875644800a(19) =586637251200a(20) =586637251200a(21) =586637251200