n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 7 |
4 | 38 |
5 | 250 |
6 | 1748 |
7 | 12463 |
8 | 89606 |
9 | 647710 |
10 | 4702844 |
11 | 34286038 |
12 | 250928732 |
13 | 1843209556 |
14 | 13586564072 |
15 | 100479347647 |
16 | 745418148806 |
17 | 5546324817718 |
18 | 41382983725292 |
19 | 309586136922898 |
20 | 2321772733668980 |
21 | 17453199438926188 |
22 | 131489046194284568 |
23 | 992678648890643206 |
[1,1,2,7,38,250,1748,12463,89606,647710,4702844, 34286038,250928732,1843209556,13586564072, 100479347647,745418148806,5546324817718, 41382983725292,309586136922898,2321772733668980, 17453199438926188,131489046194284568, 992678648890643206] |