n | a(n) |
---|---|
0 | 1 |
1 | 31 |
2 | 371 |
3 | 2646 |
4 | 13524 |
5 | 54684 |
6 | 185724 |
7 | 551034 |
8 | 1467609 |
9 | 3578575 |
10 | 8107099 |
11 | 17257604 |
12 | 34826064 |
13 | 67098864 |
14 | 124140528 |
15 | 221594796 |
16 | 383151321 |
17 | 643861911 |
18 | 1054526011 |
19 | 1687405258 |
20 | 2643571700 |
21 | 4062243900 |
22 | 6132519900 |
23 | 9107976150 |
24 | 13324667265 |
25 | 19223133111 |
26 | 27375097491 |
[1,31,371,2646,13524,54684,185724,551034,1467609, 3578575,8107099,17257604,34826064,67098864, 124140528,221594796,383151321,643861911, 1054526011,1687405258,2643571700,4062243900, 6132519900,9107976150,13324667265,19223133111, 27375097491] |