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A234207 as a simple table

na(n)
1560768
22169836
38457288
447733004
5240124200
61604387244
78897304552
864901610764
9374113860960
102910384943748
1117034103949352
12140730269072380
13826105214941608
147264759779004680
1542419107064583312
16398510367685330152

[560768,2169836,8457288,47733004,240124200,
 1604387244,8897304552,64901610764,374113860960,
 2910384943748,17034103949352,140730269072380,
 826105214941608,7264759779004680,
 42419107064583312,398510367685330152]