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A120607 as a simple table

na(n)
01
13
215
3270
45505
5124818
63028200
776896180
82018211930
954311811330
101490518569747
1141556060361920
121173726329836125
1333513124885393020
14965755118941566180
1528051840723006217040
16820439774630057541690

[1,3,15,270,5505,124818,3028200,76896180,
 2018211930,54311811330,1490518569747,
 41556060361920,1173726329836125,33513124885393020,
 965755118941566180,28051840723006217040,
 820439774630057541690]