n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 26 |
4 | 91 |
5 | 424 |
6 | 1563 |
7 | 7490 |
8 | 28363 |
9 | 138154 |
10 | 532277 |
11 | 2622108 |
12 | 10229514 |
13 | 50827494 |
14 | 200236656 |
15 | 1001864238 |
16 | 3978724091 |
17 | 20024629606 |
18 | 80072228433 |
19 | 405071776024 |
20 | 1629554359654 |
21 | 8281491341260 |
22 | 33495987519034 |
23 | 170937706521070 |
24 | 694795683685757 |
25 | 3559265886170942 |
[1,2,6,26,91,424,1563,7490,28363,138154,532277, 2622108,10229514,50827494,200236656,1001864238, 3978724091,20024629606,80072228433,405071776024, 1629554359654,8281491341260,33495987519034, 170937706521070,694795683685757,3559265886170942] |