n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 6 |
6 | 37 |
7 | 183 |
8 | 877 |
9 | 3930 |
10 | 17185 |
11 | 73095 |
12 | 306361 |
13 | 1267266 |
14 | 5198557 |
15 | 21182343 |
16 | 85910917 |
17 | 347187210 |
18 | 1399451545 |
19 | 5629911015 |
20 | 22616256721 |
21 | 90754855026 |
22 | 363890126677 |
23 | 1458172596903 |
24 | 5840531635357 |
25 | 23385650196090 |
[0,0,0,1,6,37,183,877,3930,17185,73095,306361, 1267266,5198557,21182343,85910917,347187210, 1399451545,5629911015,22616256721,90754855026, 363890126677,1458172596903,5840531635357, 23385650196090] |