n | a(n) |
---|---|
0 | 2 |
1 | 5 |
2 | 15 |
3 | 50 |
4 | 177 |
5 | 650 |
6 | 2445 |
7 | 9350 |
8 | 36177 |
9 | 141170 |
10 | 554325 |
11 | 2186750 |
12 | 8656377 |
13 | 34355690 |
14 | 136617405 |
15 | 544061750 |
16 | 2169039777 |
17 | 8654570210 |
18 | 34553579685 |
19 | 138020346350 |
20 | 551499730377 |
21 | 2204254480730 |
22 | 8811785649165 |
23 | 35231447872550 |
24 | 140878711512177 |
25 | 563373614503250 |
[2,5,15,50,177,650,2445,9350,36177,141170,554325, 2186750,8656377,34355690,136617405,544061750, 2169039777,8654570210,34553579685,138020346350, 551499730377,2204254480730,8811785649165, 35231447872550,140878711512177,563373614503250] |