n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 5 |
4 | 14 |
5 | 37 |
6 | 99 |
7 | 260 |
8 | 681 |
9 | 1785 |
10 | 4674 |
11 | 12237 |
12 | 32039 |
13 | 83880 |
14 | 219601 |
15 | 574925 |
16 | 1505174 |
17 | 3940597 |
18 | 10316619 |
19 | 27009260 |
20 | 70711161 |
21 | 185124225 |
22 | 484661514 |
23 | 1268860317 |
24 | 3321919439 |
25 | 8696898000 |
26 | 22768774561 |
27 | 59609425685 |
28 | 156059502494 |
[0,1,5,14,37,99,260,681,1785,4674,12237,32039, 83880,219601,574925,1505174,3940597,10316619, 27009260,70711161,185124225,484661514,1268860317, 3321919439,8696898000,22768774561,59609425685, 156059502494] |