n | a(n) |
---|---|
1 | 0 |
2 | 3 |
3 | 12 |
4 | 40 |
5 | 98 |
6 | 253 |
7 | 540 |
8 | 1199 |
9 | 2415 |
10 | 4893 |
11 | 9268 |
12 | 17864 |
13 | 32421 |
14 | 59265 |
15 | 104632 |
16 | 184338 |
17 | 315414 |
18 | 540155 |
19 | 901845 |
20 | 1504173 |
21 | 2461932 |
22 | 4013511 |
23 | 6443170 |
24 | 10314675 |
25 | 16281749 |
26 | 25608450 |
27 | 39838855 |
28 | 61716941 |
29 | 94682665 |
30 | 144726102 |
[0,3,12,40,98,253,540,1199,2415,4893,9268,17864, 32421,59265,104632,184338,315414,540155,901845, 1504173,2461932,4013511,6443170,10314675,16281749, 25608450,39838855,61716941,94682665,144726102] |