n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 3 |
3 | 8 |
4 | 25 |
5 | 78 |
6 | 270 |
7 | 926 |
8 | 3305 |
9 | 11868 |
10 | 43232 |
11 | 158586 |
12 | 586530 |
13 | 2181088 |
14 | 8154710 |
15 | 30620868 |
16 | 115435625 |
17 | 436654794 |
18 | 1656793374 |
19 | 6303490610 |
20 | 24041649128 |
21 | 91899730068 |
22 | 352002058402 |
23 | 1350767683698 |
24 | 5192237233602 |
25 | 19989786008160 |
[0,1,3,8,25,78,270,926,3305,11868,43232,158586, 586530,2181088,8154710,30620868,115435625, 436654794,1656793374,6303490610,24041649128, 91899730068,352002058402,1350767683698, 5192237233602,19989786008160] |