n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 3 |
4 | 7 |
5 | 20 |
6 | 51 |
7 | 121 |
8 | 290 |
9 | 711 |
10 | 1747 |
11 | 4268 |
12 | 10407 |
13 | 25405 |
14 | 62066 |
15 | 151611 |
16 | 370255 |
17 | 904196 |
18 | 2208267 |
19 | 5393233 |
20 | 13171682 |
21 | 32168415 |
22 | 78563131 |
23 | 191870876 |
24 | 468596895 |
25 | 1144430581 |
26 | 2794984562 |
27 | 6826049523 |
28 | 16670917207 |
29 | 40714541300 |
[0,1,2,3,7,20,51,121,290,711,1747,4268,10407, 25405,62066,151611,370255,904196,2208267,5393233, 13171682,32168415,78563131,191870876,468596895, 1144430581,2794984562,6826049523,16670917207, 40714541300] |