n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 3 |
4 | 10 |
5 | 36 |
6 | 145 |
7 | 666 |
8 | 3466 |
9 | 19956 |
10 | 124111 |
11 | 821601 |
12 | 5755987 |
13 | 42634089 |
14 | 333827776 |
15 | 2759262897 |
16 | 24000288202 |
17 | 218806121205 |
18 | 2082848200057 |
19 | 20639203885008 |
20 | 212441617055458 |
21 | 2268057343273491 |
22 | 25085332185250564 |
23 | 287096974919978292 |
24 | 3395697093278589844 |
[1,0,1,3,10,36,145,666,3466,19956,124111,821601, 5755987,42634089,333827776,2759262897,24000288202, 218806121205,2082848200057,20639203885008, 212441617055458,2268057343273491, 25085332185250564,287096974919978292, 3395697093278589844] |