n | a(n) |
---|---|
1 | 0 |
2 | 10 |
3 | 30 |
4 | 112 |
5 | 300 |
6 | 840 |
7 | 2044 |
8 | 4864 |
9 | 10944 |
10 | 23960 |
11 | 50908 |
12 | 105840 |
13 | 215748 |
14 | 432656 |
15 | 855240 |
16 | 1669568 |
17 | 3223404 |
18 | 6162552 |
19 | 11678540 |
20 | 21957440 |
21 | 40988976 |
22 | 76019944 |
23 | 140155100 |
24 | 256995936 |
25 | 468887700 |
26 | 851538064 |
27 | 1539858168 |
28 | 2773522192 |
29 | 4977094956 |
30 | 8900629800 |
[0,10,30,112,300,840,2044,4864,10944,23960,50908, 105840,215748,432656,855240,1669568,3223404, 6162552,11678540,21957440,40988976,76019944, 140155100,256995936,468887700,851538064, 1539858168,2773522192,4977094956,8900629800] |