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A001625 as a simple table

na(n)
22
34
460
51276
641888
71916064
8116522048
99069595840
10878460379392
11103547791177216
1214588580791234048
132420219602973093376
14466877775127725240320
15103607067936116866084864
1626204424894484840874483712

[2,4,60,1276,41888,1916064,116522048,9069595840,
 878460379392,103547791177216,14588580791234048,
 2420219602973093376,466877775127725240320,
 103607067936116866084864,
 26204424894484840874483712]