n | a(n) |
---|---|
0 | 1 |
1 | 9 |
2 | 45 |
3 | 165 |
4 | 495 |
5 | 1287 |
6 | 3003 |
7 | 6435 |
8 | 12870 |
9 | 24309 |
10 | 43749 |
11 | 75537 |
12 | 125805 |
13 | 202995 |
14 | 318483 |
15 | 487311 |
16 | 729036 |
17 | 1068705 |
18 | 1537965 |
19 | 2176317 |
20 | 3032523 |
21 | 4166175 |
22 | 5649435 |
23 | 7568955 |
24 | 10027986 |
25 | 13148685 |
26 | 17074629 |
27 | 21973545 |
28 | 28040265 |
29 | 35499915 |
30 | 44611347 |
31 | 55670823 |
32 | 69015960 |
[1,9,45,165,495,1287,3003,6435,12870,24309,43749, 75537,125805,202995,318483,487311,729036,1068705, 1537965,2176317,3032523,4166175,5649435,7568955, 10027986,13148685,17074629,21973545,28040265, 35499915,44611347,55670823,69015960] |