n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 14 |
5 | 42 |
6 | 132 |
7 | 429 |
8 | 1430 |
9 | 4862 |
10 | 16796 |
11 | 58785 |
12 | 207999 |
13 | 742795 |
14 | 2673760 |
15 | 9690969 |
16 | 35337321 |
17 | 129543843 |
18 | 477158000 |
19 | 1765043115 |
20 | 6554105415 |
21 | 24421914855 |
22 | 91289026931 |
23 | 342225162126 |
24 | 1286341683924 |
25 | 4846861938006 |
26 | 18303921153521 |
27 | 69268371485362 |
28 | 262644901975126 |
[1,1,2,5,14,42,132,429,1430,4862,16796,58785, 207999,742795,2673760,9690969,35337321,129543843, 477158000,1765043115,6554105415,24421914855, 91289026931,342225162126,1286341683924, 4846861938006,18303921153521,69268371485362, 262644901975126] |