n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 7 |
3 | 26 |
4 | 108 |
5 | 472 |
6 | 2159 |
7 | 10194 |
8 | 49396 |
9 | 244328 |
10 | 1229308 |
11 | 6273896 |
12 | 32410096 |
13 | 169181664 |
14 | 891181607 |
15 | 4731912082 |
16 | 25302648644 |
17 | 136150941064 |
18 | 736747902236 |
19 | 4007011320808 |
20 | 21893702201648 |
21 | 120125750018656 |
22 | 661630546993116 |
23 | 3656966382542984 |
24 | 20278320788680912 |
25 | 112782556853239712 |
[1,2,7,26,108,472,2159,10194,49396,244328,1229308, 6273896,32410096,169181664,891181607,4731912082, 25302648644,136150941064,736747902236, 4007011320808,21893702201648,120125750018656, 661630546993116,3656966382542984, 20278320788680912,112782556853239712] |