n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 5 |
4 | 17 |
5 | 50 |
6 | 138 |
7 | 370 |
8 | 979 |
9 | 2575 |
10 | 6755 |
11 | 17700 |
12 | 46356 |
13 | 121380 |
14 | 317797 |
15 | 832025 |
16 | 2178293 |
17 | 5702870 |
18 | 14930334 |
19 | 39088150 |
20 | 102334135 |
21 | 267914275 |
22 | 701408711 |
23 | 1836311880 |
24 | 4807526952 |
25 | 12586269000 |
26 | 32951280073 |
27 | 86267571245 |
28 | 225851433689 |
29 | 591286729850 |
[0,0,1,5,17,50,138,370,979,2575,6755,17700,46356, 121380,317797,832025,2178293,5702870,14930334, 39088150,102334135,267914275,701408711,1836311880, 4807526952,12586269000,32951280073,86267571245, 225851433689,591286729850] |