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A140253 as a simple table

n a(n)
0 -1
1 1
2 2
3 7
4 14
5 31
6 62
7 127
8 254
9 511
10 1022
11 2047
12 4094
13 8191
14 16382
15 32767
16 65534
17 131071
18 262142
19 524287
20 1048574
21 2097151
22 4194302
23 8388607
24 16777214
25 33554431
26 67108862
27 134217727
28 268435454
29 536870911

[-1,1,2,7,14,31,62,127,254,511,1022,2047,4094,
 8191,16382,32767,65534,131071,262142,524287,
 1048574,2097151,4194302,8388607,16777214,33554431,
 67108862,134217727,268435454,536870911]

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)