n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 7 |
4 | 29 |
5 | 93 |
6 | 260 |
7 | 689 |
8 | 1845 |
9 | 5150 |
10 | 14897 |
11 | 43663 |
12 | 127451 |
13 | 368383 |
14 | 1056682 |
15 | 3022366 |
16 | 8651672 |
17 | 24818978 |
18 | 71319058 |
19 | 205070493 |
20 | 589550733 |
21 | 1694075057 |
22 | 4866102091 |
23 | 13975547842 |
24 | 40139685023 |
25 | 115298782211 |
26 | 331216158188 |
27 | 951506566087 |
28 | 2733431466995 |
[0,0,1,7,29,93,260,689,1845,5150,14897,43663, 127451,368383,1056682,3022366,8651672,24818978, 71319058,205070493,589550733,1694075057, 4866102091,13975547842,40139685023,115298782211, 331216158188,951506566087,2733431466995] |