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A254784 as a simple table

na(n)
12
213
350
4147
5366
6810
71640
83094
95510
109355
1115256
1224037
1336760
1454768
1579732
16113704
17159176
18219141
19297160
20397433
21524872
22685180
23884934
241131674
251434000
261801673
272245718
282778531
293413988
304167558
315056430
326099644
337318228
348735337
3510376402

[2,13,50,147,366,810,1640,3094,5510,9355,15256,
 24037,36760,54768,79732,113704,159176,219141,
 297160,397433,524872,685180,884934,1131674,
 1434000,1801673,2245718,2778531,3413988,4167558,
 5056430,6099644,7318228,8735337,10376402]