n | a(n) |
---|---|
1 | 1 |
2 | 11 |
3 | 51 |
4 | 176 |
5 | 530 |
6 | 1490 |
7 | 4043 |
8 | 10773 |
9 | 28445 |
10 | 74770 |
11 | 196116 |
12 | 513876 |
13 | 1345861 |
14 | 3524111 |
15 | 9226935 |
16 | 24157220 |
17 | 63245318 |
18 | 165579398 |
19 | 433493615 |
20 | 1134902265 |
21 | 2971214081 |
22 | 7778740966 |
23 | 20365009896 |
24 | 53316289896 |
25 | 139583861065 |
26 | 365435294675 |
27 | 956722024443 |
28 | 2504730780248 |
[1,11,51,176,530,1490,4043,10773,28445,74770, 196116,513876,1345861,3524111,9226935,24157220, 63245318,165579398,433493615,1134902265, 2971214081,7778740966,20365009896,53316289896, 139583861065,365435294675,956722024443, 2504730780248] |