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A180300 as a simple table

na(n)
111
1273788
131645215
146838832
1516011905
1630931296
1755439448
1895585220
19160286166
20262462010
21420630210
22660990330
231020099795
241548293760
252314026000
263409331640
274956643692
287117231968
2910101573944
3014182012680
3119708107276

[1,73788,1645215,6838832,16011905,30931296,
 55439448,95585220,160286166,262462010,420630210,
 660990330,1020099795,1548293760,2314026000,
 3409331640,4956643692,7117231968,10101573944,
 14182012680,19708107276]