n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 10 |
3 | 57 |
4 | 240 |
5 | 800 |
6 | 2226 |
7 | 5390 |
8 | 11712 |
9 | 23355 |
10 | 43450 |
11 | 76351 |
12 | 127920 |
13 | 205842 |
14 | 319970 |
15 | 482700 |
16 | 709376 |
17 | 1018725 |
18 | 1433322 |
19 | 1980085 |
20 | 2690800 |
21 | 3602676 |
22 | 4758930 |
23 | 6209402 |
24 | 8011200 |
25 | 10229375 |
26 | 12937626 |
27 | 16219035 |
28 | 20166832 |
29 | 24885190 |
30 | 30490050 |
[0,1,10,57,240,800,2226,5390,11712,23355,43450, 76351,127920,205842,319970,482700,709376,1018725, 1433322,1980085,2690800,3602676,4758930,6209402, 8011200,10229375,12937626,16219035,20166832, 24885190,30490050] |