n | a(n) |
---|---|
0 | 1 |
1 | 30 |
2 | 340 |
3 | 2275 |
4 | 10878 |
5 | 41160 |
6 | 131040 |
7 | 365310 |
8 | 916575 |
9 | 2110966 |
10 | 4528524 |
11 | 9150505 |
12 | 17568460 |
13 | 32272800 |
14 | 57041664 |
15 | 97454268 |
16 | 161556525 |
17 | 260710590 |
18 | 410664100 |
19 | 632879247 |
20 | 956166442 |
21 | 1418672200 |
22 | 2070276000 |
23 | 2975456250 |
24 | 4216691115 |
[1,30,340,2275,10878,41160,131040,365310,916575, 2110966,4528524,9150505,17568460,32272800, 57041664,97454268,161556525,260710590,410664100, 632879247,956166442,1418672200,2070276000, 2975456250,4216691115] |