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A155599 as a simple table

n a(n)
0 1
1 7
2 61
3 505
4 4081
5 32737
6 262081
7 2097025
8 16776961
9 134217217
10 1073740801
11 8589932545
12 68719472641
13 549755805697
14 4398046494721
15 35184372056065
16 281474976645121
17 2251799813554177
18 18014398509219841
19 144115188075331585

[1,7,61,505,4081,32737,262081,2097025,16776961,
 134217217,1073740801,8589932545,68719472641,
 549755805697,4398046494721,35184372056065,
 281474976645121,2251799813554177,
 18014398509219841,144115188075331585]

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Last modified April 13 22:11 EDT 2021. Contains 342941 sequences. (Running on oeis4.)