login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

A289458 as a simple table

na(n)
01
12
26
315
430
561
6127
7255
8511
91011
102047
114095
128191
1316383
1432764
1565535
16131071
17261903
18524287
191048575
202097151
214194291
228388607
2316777167
2433554431
2567108863
26134217727
27268435455
28536870911
291073741823
302147483647
314294967295
328589934591

[1,2,6,15,30,61,127,255,511,1011,2047,4095,8191,
 16383,32764,65535,131071,261903,524287,1048575,
 2097151,4194291,8388607,16777167,33554431,
 67108863,134217727,268435455,536870911,1073741823,
 2147483647,4294967295,8589934591]