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A186629 as a simple table

na(n)
1262144
29576448
39576448
4349839616
5876951552
6349839616
712780078472
880485522400
980485522400
1012780078472
11351107784608
127188107084815
1318496850510312
147188107084815
15351107784608
169646003088512
17422905697694540

[262144,9576448,9576448,349839616,876951552,
 349839616,12780078472,80485522400,80485522400,
 12780078472,351107784608,7188107084815,
 18496850510312,7188107084815,351107784608,
 9646003088512,422905697694540]