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A083420 as a simple table

n a(n)
0 1
1 7
2 31
3 127
4 511
5 2047
6 8191
7 32767
8 131071
9 524287
10 2097151
11 8388607
12 33554431
13 134217727
14 536870911
15 2147483647
16 8589934591
17 34359738367
18 137438953471
19 549755813887
20 2199023255551
21 8796093022207
22 35184372088831
23 140737488355327
24 562949953421311

[1,7,31,127,511,2047,8191,32767,131071,524287,
 2097151,8388607,33554431,134217727,536870911,
 2147483647,8589934591,34359738367,137438953471,
 549755813887,2199023255551,8796093022207,
 35184372088831,140737488355327,562949953421311]

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Last modified May 29 16:27 EDT 2015. Contains 257936 sequences.