n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 1 |
7 | 5 |
8 | 19 |
9 | 61 |
10 | 180 |
11 | 498 |
12 | 1318 |
13 | 3376 |
14 | 8433 |
15 | 20659 |
16 | 49802 |
17 | 118506 |
18 | 278857 |
19 | 650072 |
20 | 1503003 |
21 | 3450424 |
22 | 7870894 |
23 | 17854238 |
24 | 40295522 |
25 | 90531067 |
26 | 202552028 |
27 | 451479327 |
28 | 1002843896 |
29 | 2220473234 |
30 | 4902040602 |
31 | 10792481396 |
[0,0,0,0,0,0,1,5,19,61,180,498,1318,3376,8433, 20659,49802,118506,278857,650072,1503003,3450424, 7870894,17854238,40295522,90531067,202552028, 451479327,1002843896,2220473234,4902040602, 10792481396] |