n | a(n) |
---|---|
1 | 8 |
2 | 20 |
3 | 55 |
4 | 160 |
5 | 475 |
6 | 1420 |
7 | 4255 |
8 | 12760 |
9 | 38275 |
10 | 114820 |
11 | 344455 |
12 | 1033360 |
13 | 3100075 |
14 | 9300220 |
15 | 27900655 |
16 | 83701960 |
17 | 251105875 |
18 | 753317620 |
19 | 2259952855 |
20 | 6779858560 |
21 | 20339575675 |
22 | 61018727020 |
23 | 183056181055 |
24 | 549168543160 |
25 | 1647505629475 |
26 | 4942516888420 |
27 | 14827550665255 |
[8,20,55,160,475,1420,4255,12760,38275,114820, 344455,1033360,3100075,9300220,27900655,83701960, 251105875,753317620,2259952855,6779858560, 20339575675,61018727020,183056181055,549168543160, 1647505629475,4942516888420,14827550665255] |