n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 9 |
5 | 21 |
6 | 51 |
7 | 128 |
8 | 331 |
9 | 880 |
10 | 2402 |
11 | 6724 |
12 | 19285 |
13 | 56612 |
14 | 169908 |
15 | 520723 |
16 | 1627477 |
17 | 5180064 |
18 | 16766824 |
19 | 55112302 |
20 | 183710312 |
21 | 620213500 |
22 | 2118094664 |
23 | 7309077920 |
24 | 25459737905 |
25 | 89438446602 |
26 | 316606738516 |
27 | 1128566016617 |
28 | 4048230694964 |
29 | 14604517154115 |
[1,1,2,4,9,21,51,128,331,880,2402,6724,19285, 56612,169908,520723,1627477,5180064,16766824, 55112302,183710312,620213500,2118094664, 7309077920,25459737905,89438446602,316606738516, 1128566016617,4048230694964,14604517154115] |