n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 5 |
5 | 12 |
6 | 33 |
7 | 90 |
8 | 261 |
9 | 765 |
10 | 2309 |
11 | 7058 |
12 | 21932 |
13 | 68843 |
14 | 218378 |
15 | 698268 |
16 | 2249370 |
17 | 7291072 |
18 | 23766308 |
19 | 77850244 |
20 | 256141505 |
21 | 846090860 |
22 | 2804864997 |
23 | 9328658392 |
24 | 31118365152 |
25 | 104086821258 |
26 | 349029100890 |
27 | 1173087112579 |
28 | 3951183698640 |
29 | 13334782347941 |
[0,1,1,2,5,12,33,90,261,765,2309,7058,21932,68843, 218378,698268,2249370,7291072,23766308,77850244, 256141505,846090860,2804864997,9328658392, 31118365152,104086821258,349029100890, 1173087112579,3951183698640,13334782347941] |