n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 3 |
3 | 16 |
4 | 63 |
5 | 275 |
6 | 1152 |
7 | 4901 |
8 | 20727 |
9 | 87856 |
10 | 372075 |
11 | 1576279 |
12 | 6676992 |
13 | 28284569 |
14 | 119814747 |
15 | 507544400 |
16 | 2149990983 |
17 | 9107510539 |
18 | 38580029568 |
19 | 163427634589 |
20 | 692290558575 |
21 | 2932589884016 |
22 | 12422650070163 |
23 | 52623190204271 |
24 | 222915410823168 |
25 | 944284833600625 |
26 | 4000054745057907 |
27 | 16944503814103696 |
28 | 71778070001033487 |
[0,1,3,16,63,275,1152,4901,20727,87856,372075, 1576279,6676992,28284569,119814747,507544400, 2149990983,9107510539,38580029568,163427634589, 692290558575,2932589884016,12422650070163, 52623190204271,222915410823168,944284833600625, 4000054745057907,16944503814103696, 71778070001033487] |