n | a(n) |
---|---|
1 | 1 |
2 | 15 |
3 | 126 |
4 | 730 |
5 | 3270 |
6 | 11991 |
7 | 37450 |
8 | 102726 |
9 | 253485 |
10 | 573265 |
11 | 1205556 |
12 | 2384460 |
13 | 4475926 |
14 | 8031765 |
15 | 13858860 |
16 | 23106196 |
17 | 37372545 |
18 | 58837851 |
19 | 90421570 |
20 | 135971430 |
21 | 200486286 |
22 | 290376955 |
23 | 413769126 |
24 | 580852650 |
25 | 804281725 |
[1,15,126,730,3270,11991,37450,102726,253485, 573265,1205556,2384460,4475926,8031765,13858860, 23106196,37372545,58837851,90421570,135971430, 200486286,290376955,413769126,580852650,804281725] |