n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 12 |
5 | 31 |
6 | 85 |
7 | 248 |
8 | 762 |
9 | 2440 |
10 | 8064 |
11 | 27300 |
12 | 94150 |
13 | 329462 |
14 | 1166512 |
15 | 4170414 |
16 | 15031771 |
17 | 54559855 |
18 | 199236416 |
19 | 731434971 |
20 | 2697934577 |
21 | 9993489968 |
22 | 37157691565 |
23 | 138633745173 |
24 | 518851050388 |
25 | 1947388942885 |
26 | 7328186394725 |
[0,1,2,5,12,31,85,248,762,2440,8064,27300,94150, 329462,1166512,4170414,15031771,54559855, 199236416,731434971,2697934577,9993489968, 37157691565,138633745173,518851050388, 1947388942885,7328186394725] |