n | a(n) |
---|---|
1 | 0 |
2 | 2 |
3 | 9 |
4 | 26 |
5 | 63 |
6 | 140 |
7 | 297 |
8 | 614 |
9 | 1251 |
10 | 2528 |
11 | 5085 |
12 | 10202 |
13 | 20439 |
14 | 40916 |
15 | 81873 |
16 | 163790 |
17 | 327627 |
18 | 655304 |
19 | 1310661 |
20 | 2621378 |
21 | 5242815 |
22 | 10485692 |
23 | 20971449 |
24 | 41942966 |
25 | 83886003 |
26 | 167772080 |
27 | 335544237 |
28 | 671088554 |
29 | 1342177191 |
[0,2,9,26,63,140,297,614,1251,2528,5085,10202, 20439,40916,81873,163790,327627,655304,1310661, 2621378,5242815,10485692,20971449,41942966, 83886003,167772080,335544237,671088554,1342177191] |