n | a(n) |
---|---|
0 | 1 |
1 | 30 |
2 | 464 |
3 | 4930 |
4 | 40454 |
5 | 273266 |
6 | 1581775 |
7 | 8064464 |
8 | 36943940 |
9 | 154385704 |
10 | 595514217 |
11 | 2140442150 |
12 | 7224301969 |
13 | 23043923160 |
14 | 69844600965 |
15 | 202081362622 |
16 | 560350431315 |
17 | 1494273031164 |
18 | 3843681391300 |
19 | 9562404542460 |
20 | 23062890166272 |
[1,30,464,4930,40454,273266,1581775,8064464, 36943940,154385704,595514217,2140442150, 7224301969,23043923160,69844600965,202081362622, 560350431315,1494273031164,3843681391300, 9562404542460,23062890166272] |