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A092798 as a simple table

na(n)
12
216
38192
4274877906944
55070602400912917605986812821504
6115792089237316195423570985008687907853269984665640564039457584007913129639936

[2,16,8192,274877906944,
 5070602400912917605986812821504,
 11579208923731619542357098500868790785326998466564\
 0564039457584007913129639936]