n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 5 |
3 | 20 |
4 | 81 |
5 | 328 |
6 | 1328 |
7 | 5377 |
8 | 21771 |
9 | 88149 |
10 | 356908 |
11 | 1445091 |
12 | 5851054 |
13 | 23690434 |
14 | 95920609 |
15 | 388374617 |
16 | 1572496721 |
17 | 6366909240 |
18 | 25779089221 |
19 | 104377401344 |
20 | 422615470156 |
21 | 1711135105065 |
22 | 6928244597163 |
23 | 28051889681905 |
24 | 113579782539432 |
25 | 459875150943079 |
26 | 1861996472668870 |
27 | 7539069804318358 |
28 | 30525070454573633 |
29 | 123593487053663201 |
30 | 500419812783602493 |
[1,1,5,20,81,328,1328,5377,21771,88149,356908, 1445091,5851054,23690434,95920609,388374617, 1572496721,6366909240,25779089221,104377401344, 422615470156,1711135105065,6928244597163, 28051889681905,113579782539432,459875150943079, 1861996472668870,7539069804318358, 30525070454573633,123593487053663201, 500419812783602493] |