n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 18 |
4 | 56 |
5 | 170 |
6 | 492 |
7 | 1358 |
8 | 3600 |
9 | 9234 |
10 | 23060 |
11 | 56342 |
12 | 135192 |
13 | 319514 |
14 | 745500 |
15 | 1720350 |
16 | 3932192 |
17 | 8912930 |
18 | 20054052 |
19 | 44826662 |
20 | 99614760 |
21 | 220201002 |
22 | 484442156 |
23 | 1061158958 |
24 | 2315255856 |
25 | 5033164850 |
26 | 10905190452 |
27 | 23555211318 |
28 | 50734301240 |
29 | 108984795194 |
[1,2,6,18,56,170,492,1358,3600,9234,23060,56342, 135192,319514,745500,1720350,3932192,8912930, 20054052,44826662,99614760,220201002,484442156, 1061158958,2315255856,5033164850,10905190452, 23555211318,50734301240,108984795194] |