A090904 Group the natural numbers so that the n-th group product is a multiple of the (n-1)th group product. (1), (2),(3,4), (5,6,7,8),(9,10,11,12,13,14),(15,16,17,18,19,20,21,22,23,24,25,26),... Sequence contains the product of terms of the groups.

1, 2, 12, 1680, 2162160, 4626053752320000, 13644281345408020027550269440000, 4402827357584746886229433170489943024971625310770489684257669120000000000