n | a(n) |
---|---|
0 | 21 |
1 | 336 |
2 | 2646 |
3 | 14112 |
4 | 58212 |
5 | 199584 |
6 | 594594 |
7 | 1585584 |
8 | 3864861 |
9 | 8744736 |
10 | 18582564 |
11 | 37425024 |
12 | 71954064 |
13 | 132838272 |
14 | 236618172 |
15 | 408282336 |
16 | 684723501 |
17 | 1119300336 |
18 | 1787771370 |
19 | 2795913120 |
20 | 4289184900 |
21 | 6464858400 |
22 | 9587091150 |
23 | 14005489680 |
24 | 20177780805 |
25 | 28697288256 |
[21,336,2646,14112,58212,199584,594594,1585584, 3864861,8744736,18582564,37425024,71954064, 132838272,236618172,408282336,684723501, 1119300336,1787771370,2795913120,4289184900, 6464858400,9587091150,14005489680,20177780805, 28697288256] |