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A291210 as a simple table

na(n)
12
24
310
427
580
6230
7644
81780
94879
1013315
1136261
1298650
13268260
14729326
151982655
165389579
1714650584
1839824632
19108254817
20294267376
21799901968
222174359323
235910521810
2416066464445
2543673178798
26118716008808
27322703570021
28877199250941

[2,4,10,27,80,230,644,1780,4879,13315,36261,98650,
 268260,729326,1982655,5389579,14650584,39824632,
 108254817,294267376,799901968,2174359323,
 5910521810,16066464445,43673178798,118716008808,
 322703570021,877199250941]