n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 10 |
4 | 38 |
5 | 134 |
6 | 507 |
7 | 2018 |
8 | 8024 |
9 | 33221 |
10 | 138794 |
11 | 588023 |
12 | 2533091 |
13 | 10975240 |
14 | 48141523 |
15 | 212612970 |
16 | 945494118 |
17 | 4234748400 |
18 | 19059805239 |
19 | 86265428509 |
20 | 392211632290 |
21 | 1790568345881 |
22 | 8207727624586 |
23 | 37751086931393 |
24 | 174216385022607 |
25 | 806418636880499 |
26 | 3743114760570289 |
27 | 17420339890164959 |
[1,1,4,10,38,134,507,2018,8024,33221,138794, 588023,2533091,10975240,48141523,212612970, 945494118,4234748400,19059805239,86265428509, 392211632290,1790568345881,8207727624586, 37751086931393,174216385022607,806418636880499, 3743114760570289,17420339890164959] |