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A011580 as a simple table

na(n)
11
21073741823
3102944492305501
4192050639071964750
538613005164147863680
61803573616698300679617
729481727160618553500317
8215233066194937952784480
9821091876924369227235630

[1,1073741823,102944492305501,192050639071964750,
 38613005164147863680,1803573616698300679617,
 29481727160618553500317,215233066194937952784480,
 821091876924369227235630]