n | a(n) |
---|---|
1 | 0 |
2 | 2 |
3 | 7 |
4 | 23 |
5 | 73 |
6 | 227 |
7 | 697 |
8 | 2123 |
9 | 6433 |
10 | 19427 |
11 | 58537 |
12 | 176123 |
13 | 529393 |
14 | 1590227 |
15 | 4774777 |
16 | 14332523 |
17 | 43013953 |
18 | 129074627 |
19 | 387289417 |
20 | 1161999323 |
21 | 3486260113 |
22 | 10459304627 |
23 | 31378962457 |
24 | 94138984523 |
25 | 282421147873 |
26 | 847271832227 |
[0,2,7,23,73,227,697,2123,6433,19427,58537,176123, 529393,1590227,4774777,14332523,43013953, 129074627,387289417,1161999323,3486260113, 10459304627,31378962457,94138984523,282421147873, 847271832227] |