n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 5 |
6 | 17 |
7 | 56 |
8 | 182 |
9 | 573 |
10 | 1792 |
11 | 5533 |
12 | 16977 |
13 | 51652 |
14 | 156291 |
15 | 470069 |
16 | 1407264 |
17 | 4193977 |
18 | 12451760 |
19 | 36838994 |
20 | 108656009 |
21 | 319583578 |
22 | 937634011 |
23 | 2744720126 |
24 | 8018165821 |
25 | 23379886511 |
26 | 68056985580 |
27 | 197800670948 |
28 | 574068309840 |
29 | 1663907364480 |
30 | 4816910618093 |
31 | 13929036720057 |
[0,0,0,1,5,17,56,182,573,1792,5533,16977,51652, 156291,470069,1407264,4193977,12451760,36838994, 108656009,319583578,937634011,2744720126, 8018165821,23379886511,68056985580,197800670948, 574068309840,1663907364480,4816910618093, 13929036720057] |