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A078227 as a simple table

na(n)
12
24
38
416
532
696
7672
845696
92787456
10270383232
11507238943232
1227274745216527872
13141232121898569036783616
14216567470725252501672125832323072

[2,4,8,16,32,96,672,45696,2787456,270383232,
 507238943232,27274745216527872,
 141232121898569036783616,
 216567470725252501672125832323072]