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A262826 as a simple table

na(n)
12
28
3536
464960
533554592
668718964352
7562949953422208
818446744065119352832
92417851639229258752070144
101267650600228227149696894752768
112658455991569831745807614120560711680
1222300745198530623141526273540526772167065600
13748288838313422294120286634350736906063837462110208
14100433627766186892221372630770688837357523572410678079422464

[2,8,536,64960,33554592,68718964352,
 562949953422208,18446744065119352832,
 2417851639229258752070144,
 1267650600228227149696894752768,
 2658455991569831745807614120560711680,
 22300745198530623141526273540526772167065600,
 74828883831342229412028663435073690606383746211020\
 8,
 10043362776618689222137263077068883735752357241067\
 8079422464]