n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 1 |
4 | 9 |
5 | 69 |
6 | 510 |
7 | 3740 |
8 | 27454 |
9 | 202321 |
10 | 1498074 |
11 | 11145324 |
12 | 83291428 |
13 | 625022772 |
14 | 4707757080 |
15 | 35579447280 |
16 | 269718129308 |
17 | 2050317850201 |
18 | 15625047614946 |
19 | 119347362039788 |
20 | 913501931766460 |
21 | 7005437509949364 |
22 | 53817428069374328 |
23 | 414107216180618608 |
[0,0,0,1,9,69,510,3740,27454,202321,1498074, 11145324,83291428,625022772,4707757080, 35579447280,269718129308,2050317850201, 15625047614946,119347362039788,913501931766460, 7005437509949364,53817428069374328, 414107216180618608] |