n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 3 |
3 | 19 |
4 | 101 |
5 | 501 |
6 | 2486 |
7 | 12398 |
8 | 62329 |
9 | 315436 |
10 | 1605330 |
11 | 8207552 |
12 | 42124368 |
13 | 216903051 |
14 | 1119974861 |
15 | 5796944342 |
16 | 30068145889 |
17 | 156250892593 |
18 | 813310723907 |
19 | 4239676354631 |
20 | 22130265931880 |
21 | 115654632452514 |
22 | 605081974091853 |
23 | 3168828466966365 |
24 | 16610409114771876 |
25 | 87141919856550506 |
[1,0,3,19,101,501,2486,12398,62329,315436,1605330, 8207552,42124368,216903051,1119974861,5796944342, 30068145889,156250892593,813310723907, 4239676354631,22130265931880,115654632452514, 605081974091853,3168828466966365, 16610409114771876,87141919856550506] |