n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 3 |
3 | 6 |
4 | 13 |
5 | 38 |
6 | 141 |
7 | 672 |
8 | 4081 |
9 | 31544 |
10 | 310171 |
11 | 3879588 |
12 | 61725481 |
13 | 1249215110 |
14 | 32159093791 |
15 | 1053086855394 |
16 | 43865027507209 |
17 | 2324162212695626 |
18 | 156642025511922149 |
19 | 13429008862711938180 |
20 | 1464446313265909756141 |
[1,2,3,6,13,38,141,672,4081,31544,310171,3879588, 61725481,1249215110,32159093791,1053086855394, 43865027507209,2324162212695626, 156642025511922149,13429008862711938180, 1464446313265909756141] |