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A220304 as a simple table

na(n)
12
27
326
486
5291
6980
73309
811161
937656
10127036
11428581
121445887
134877950
1416456589
1555519107
16187303144
17631899019
182131818803
197192053308
2024263615009
2181857431864
22276159968238
23931672620616
243143156039330
2510603971469191

[2,7,26,86,291,980,3309,11161,37656,127036,428581,
 1445887,4877950,16456589,55519107,187303144,
 631899019,2131818803,7192053308,24263615009,
 81857431864,276159968238,931672620616,
 3143156039330,10603971469191]