n | a(n) |
---|---|
1 | 0 |
2 | 6 |
3 | 6 |
4 | 18 |
5 | 30 |
6 | 66 |
7 | 126 |
8 | 258 |
9 | 510 |
10 | 1026 |
11 | 2046 |
12 | 4098 |
13 | 8190 |
14 | 16386 |
15 | 32766 |
16 | 65538 |
17 | 131070 |
18 | 262146 |
19 | 524286 |
20 | 1048578 |
21 | 2097150 |
22 | 4194306 |
23 | 8388606 |
24 | 16777218 |
25 | 33554430 |
26 | 67108866 |
27 | 134217726 |
28 | 268435458 |
29 | 536870910 |
30 | 1073741826 |
31 | 2147483646 |
[0,6,6,18,30,66,126,258,510,1026,2046,4098,8190, 16386,32766,65538,131070,262146,524286,1048578, 2097150,4194306,8388606,16777218,33554430, 67108866,134217726,268435458,536870910,1073741826, 2147483646] |