n | a(n) |
---|---|
0 | 1 |
1 | 10 |
2 | 56 |
3 | 240 |
4 | 880 |
5 | 2912 |
6 | 8960 |
7 | 26112 |
8 | 72960 |
9 | 197120 |
10 | 518144 |
11 | 1331200 |
12 | 3354624 |
13 | 8314880 |
14 | 20316160 |
15 | 49020928 |
16 | 116981760 |
17 | 276430848 |
18 | 647495680 |
19 | 1504706560 |
20 | 3471835136 |
21 | 7958691840 |
22 | 18136170496 |
23 | 41104179200 |
24 | 92694118400 |
25 | 208071032832 |
26 | 465064427520 |
[1,10,56,240,880,2912,8960,26112,72960,197120, 518144,1331200,3354624,8314880,20316160,49020928, 116981760,276430848,647495680,1504706560, 3471835136,7958691840,18136170496,41104179200, 92694118400,208071032832,465064427520] |