n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 21 |
3 | 135 |
4 | 873 |
5 | 5643 |
6 | 36477 |
7 | 235791 |
8 | 1524177 |
9 | 9852435 |
10 | 63687141 |
11 | 411680151 |
12 | 2661142329 |
13 | 17201894427 |
14 | 111194793549 |
15 | 718774444575 |
16 | 4646231048097 |
17 | 30033709622307 |
18 | 194140950878133 |
19 | 1254946834135719 |
20 | 8112103857448713 |
[1,3,21,135,873,5643,36477,235791,1524177,9852435, 63687141,411680151,2661142329,17201894427, 111194793549,718774444575,4646231048097, 30033709622307,194140950878133,1254946834135719, 8112103857448713] |