n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 11 |
4 | 27 |
5 | 72 |
6 | 189 |
7 | 493 |
8 | 1292 |
9 | 3383 |
10 | 8855 |
11 | 23184 |
12 | 60697 |
13 | 158905 |
14 | 416020 |
15 | 1089155 |
16 | 2851443 |
17 | 7465176 |
18 | 19544085 |
19 | 51167077 |
20 | 133957148 |
21 | 350704367 |
22 | 918155951 |
23 | 2403763488 |
24 | 6293134513 |
25 | 16475640049 |
26 | 43133785636 |
27 | 112925716859 |
28 | 295643364939 |
29 | 774004377960 |
[1,1,4,11,27,72,189,493,1292,3383,8855,23184, 60697,158905,416020,1089155,2851443,7465176, 19544085,51167077,133957148,350704367,918155951, 2403763488,6293134513,16475640049,43133785636, 112925716859,295643364939,774004377960] |