n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 13 |
3 | 47 |
4 | 173 |
5 | 678 |
6 | 2735 |
7 | 11378 |
8 | 48279 |
9 | 208410 |
10 | 911571 |
11 | 4031919 |
12 | 17999628 |
13 | 81000573 |
14 | 367040404 |
15 | 1673295419 |
16 | 7669312343 |
17 | 35319197637 |
18 | 163350479756 |
19 | 758406642839 |
20 | 3533447414030 |
21 | 16514820417166 |
22 | 77412170863861 |
[1,4,13,47,173,678,2735,11378,48279,208410,911571, 4031919,17999628,81000573,367040404,1673295419, 7669312343,35319197637,163350479756,758406642839, 3533447414030,16514820417166,77412170863861] |