n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 6 |
4 | 29 |
5 | 130 |
6 | 565 |
7 | 2422 |
8 | 10317 |
9 | 43818 |
10 | 185845 |
11 | 787710 |
12 | 3337709 |
13 | 14140594 |
14 | 59904181 |
15 | 253765510 |
16 | 1074982605 |
17 | 4553728698 |
18 | 19289962933 |
19 | 81713711502 |
20 | 346145071085 |
21 | 1466294520130 |
22 | 6211324200181 |
23 | 26311593418006 |
24 | 111457702066509 |
25 | 472142410072650 |
[0,0,1,6,29,130,565,2422,10317,43818,185845, 787710,3337709,14140594,59904181,253765510, 1074982605,4553728698,19289962933,81713711502, 346145071085,1466294520130,6211324200181, 26311593418006,111457702066509,472142410072650] |