a(0) = 0, a(n) = (a(n-1) OR n) * n.

Terms

a(0) =0a(1) =1a(2) =6a(3) =21a(4) =84a(5) =425a(6) =2586a(7) =18137a(8) =145096a(9) =1305873a(10) =13058830a(11) =143647141a(12) =1723765788a(13) =22408955257a(14) =313725373682