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A271613 as a simple table

na(n)
11
24
326
4307
52571
642702
73243689
8132728354
91491326272
10101843558868
1174672717363118
1212952235029243936
13334070494079203752
14109915013016304822208
15695394278635888843298780
16579704015638436450676621584
1744655320458467210977882177104
1875051772861714827753881814035744

[1,4,26,307,2571,42702,3243689,132728354,
 1491326272,101843558868,74672717363118,
 12952235029243936,334070494079203752,
 109915013016304822208,695394278635888843298780,
 579704015638436450676621584,
 44655320458467210977882177104,
 75051772861714827753881814035744]