n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 17 |
4 | 105 |
5 | 407 |
6 | 1216 |
7 | 3036 |
8 | 6696 |
9 | 13428 |
10 | 25005 |
11 | 43861 |
12 | 73277 |
13 | 117471 |
14 | 181880 |
15 | 273268 |
16 | 399960 |
17 | 572076 |
18 | 801825 |
19 | 1103625 |
20 | 1494541 |
21 | 1994387 |
22 | 2626152 |
23 | 3416300 |
24 | 4395148 |
25 | 5596992 |
26 | 7060737 |
27 | 8830137 |
28 | 10954197 |
29 | 13487527 |
30 | 16490972 |
31 | 20031672 |
[0,0,1,17,105,407,1216,3036,6696,13428,25005, 43861,73277,117471,181880,273268,399960,572076, 801825,1103625,1494541,1994387,2626152,3416300, 4395148,5596992,7060737,8830137,10954197,13487527, 16490972,20031672] |