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A057971 as a simple table

na(n)
22
318
4133
5873
65182
727786
8135370
9602454
102466628
119358497
1233134431
13110184932
14346141949
151032550097
162938104492
178006865684
1820971632456
1952958252851
20129291697111
21305924724070
22703108665327
231572722761341

[2,18,133,873,5182,27786,135370,602454,2466628,
 9358497,33134431,110184932,346141949,1032550097,
 2938104492,8006865684,20971632456,52958252851,
 129291697111,305924724070,703108665327,
 1572722761341]