n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 15 |
4 | 38 |
5 | 94 |
6 | 231 |
7 | 564 |
8 | 1372 |
9 | 3329 |
10 | 8064 |
11 | 19512 |
12 | 47177 |
13 | 114010 |
14 | 275430 |
15 | 665247 |
16 | 1606534 |
17 | 3879302 |
18 | 9366735 |
19 | 22615356 |
20 | 54601628 |
21 | 131825377 |
22 | 318263328 |
23 | 768369744 |
24 | 1855031473 |
25 | 4478479058 |
26 | 10812064614 |
27 | 26102729679 |
28 | 63017720390 |
[1,2,6,15,38,94,231,564,1372,3329,8064,19512, 47177,114010,275430,665247,1606534,3879302, 9366735,22615356,54601628,131825377,318263328, 768369744,1855031473,4478479058,10812064614, 26102729679,63017720390] |