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A269774 as a simple table

na(n)
17
249
3343
42394
516674
6115920
7804636
85577768
938621016
10267152256
111846396944
1212751839072
1388012679328
14607126689792
154186073691072
1628850627143296
17198768754154880
181369007582681088
199426405790368000
2064890966854407680

[7,49,343,2394,16674,115920,804636,5577768,
 38621016,267152256,1846396944,12751839072,
 88012679328,607126689792,4186073691072,
 28850627143296,198768754154880,1369007582681088,
 9426405790368000,64890966854407680]