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A033840 as a simple table

n a(n)
1 2
2 20
3 92
4 16
5 1056
6 212419
7 128
8 13379
9 40695508
10 1024
11 4196352
12 13892162580
13 8192
14 268451840
15 1002493281672
16 65536
17 17180000256
18 4998382669357032
19 524288
20 1099512676352
21 3418993385062038719
22 4194304
23 70368752566272

[2,20,92,16,1056,212419,128,13379,40695508,1024,
 4196352,13892162580,8192,268451840,1002493281672,
 65536,17180000256,4998382669357032,524288,
 1099512676352,3418993385062038719,4194304,
 70368752566272]

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Last modified August 31 10:25 EDT 2024. Contains 375560 sequences. (Running on oeis4.)