n | a(n) |
---|---|
0 | 1 |
1 | 15 |
2 | 105 |
3 | 490 |
4 | 1764 |
5 | 5292 |
6 | 13860 |
7 | 32670 |
8 | 70785 |
9 | 143143 |
10 | 273273 |
11 | 496860 |
12 | 866320 |
13 | 1456560 |
14 | 2372112 |
15 | 3755844 |
16 | 5799465 |
17 | 8756055 |
18 | 12954865 |
19 | 18818646 |
20 | 26883780 |
21 | 37823500 |
22 | 52474500 |
23 | 71867250 |
24 | 97260345 |
25 | 130179231 |
26 | 172459665 |
27 | 226296280 |
28 | 294296640 |
29 | 379541184 |
[1,15,105,490,1764,5292,13860,32670,70785,143143, 273273,496860,866320,1456560,2372112,3755844, 5799465,8756055,12954865,18818646,26883780, 37823500,52474500,71867250,97260345,130179231, 172459665,226296280,294296640,379541184] |