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A017263 as a simple table

na(n)
02097152
1410338673
28031810176
364339296875
4319277809664
51174711139837
63521614606208
79095120158391
820971520000000
944231334895529
1086812553324672
11160578147647843
12282621973446656
13476837158203125
14775771085481344
151222791080775407
161874584905187328

[2097152,410338673,8031810176,64339296875,
 319277809664,1174711139837,3521614606208,
 9095120158391,20971520000000,44231334895529,
 86812553324672,160578147647843,282621973446656,
 476837158203125,775771085481344,1222791080775407,
 1874584905187328]