n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 9 |
3 | 30 |
4 | 107 |
5 | 396 |
6 | 1503 |
7 | 5820 |
8 | 22907 |
9 | 91371 |
10 | 368523 |
11 | 1500354 |
12 | 6157669 |
13 | 25448907 |
14 | 105821865 |
15 | 442409844 |
16 | 1858482563 |
17 | 7840766601 |
18 | 33207750819 |
19 | 141137445258 |
20 | 601768494201 |
21 | 2573246794374 |
22 | 11032997250357 |
23 | 47421297986868 |
24 | 204286464525165 |
25 | 881900059488741 |
[1,3,9,30,107,396,1503,5820,22907,91371,368523, 1500354,6157669,25448907,105821865,442409844, 1858482563,7840766601,33207750819,141137445258, 601768494201,2573246794374,11032997250357, 47421297986868,204286464525165,881900059488741] |