n | a(n) |
---|---|
0 | 1 |
1 | 5 |
2 | 30 |
3 | 140 |
4 | 630 |
5 | 2646 |
6 | 10710 |
7 | 41910 |
8 | 159885 |
9 | 597025 |
10 | 2190188 |
11 | 7914270 |
12 | 28230020 |
13 | 99567300 |
14 | 347720040 |
15 | 1203777072 |
16 | 4135047615 |
17 | 14105322315 |
18 | 47813634330 |
19 | 161154659820 |
20 | 540353553894 |
21 | 1803226621350 |
22 | 5991410183850 |
23 | 19827295283250 |
24 | 65371101643575 |
[1,5,30,140,630,2646,10710,41910,159885,597025, 2190188,7914270,28230020,99567300,347720040, 1203777072,4135047615,14105322315,47813634330, 161154659820,540353553894,1803226621350, 5991410183850,19827295283250,65371101643575] |