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A122216 as a simple table

na(n)
01
12
24
332
44096
5201326592
63283124128353091584
726520146032764463901929624736590416838656
8840987221884558487834659180201583257033385988411167452990072842049923846092011283152896

[1,2,4,32,4096,201326592,3283124128353091584,
 26520146032764463901929624736590416838656,
 84098722188455848783465918020158325703338598841116\
 7452990072842049923846092011283152896]