n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 7 |
4 | 19 |
5 | 69 |
6 | 188 |
7 | 683 |
8 | 1861 |
9 | 6761 |
10 | 18422 |
11 | 66927 |
12 | 182359 |
13 | 662509 |
14 | 1805168 |
15 | 6558163 |
16 | 17869321 |
17 | 64919121 |
18 | 176888042 |
19 | 642633047 |
20 | 1751011099 |
21 | 6361411349 |
22 | 17333222948 |
23 | 62971480443 |
24 | 171581218381 |
25 | 623353393081 |
26 | 1698478960862 |
[1,1,2,7,19,69,188,683,1861,6761,18422,66927, 182359,662509,1805168,6558163,17869321,64919121, 176888042,642633047,1751011099,6361411349, 17333222948,62971480443,171581218381,623353393081, 1698478960862] |