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A274063 as a simple table

n a(n)
1 0
2 1
3 25
4 26
5 51
6 119
7 218
8 771
9 1754
10 1799
11 1921
12 7967
13 16147
14 32639
15 128129
16 196611
17 458759
18 1044143
19 2031647
20 7190234
21 8323199
22 33464867
23 536581571
24 536813567
25 1073691551
26 2145328183
27 7202169026
28 8746826298
29 17179612627
30 68719005499
31 797299610790

[0,1,25,26,51,119,218,771,1754,1799,1921,7967,
 16147,32639,128129,196611,458759,1044143,2031647,
 7190234,8323199,33464867,536581571,536813567,
 1073691551,2145328183,7202169026,8746826298,
 17179612627,68719005499,797299610790]

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Last modified October 1 00:54 EDT 2020. Contains 337440 sequences. (Running on oeis4.)