n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 3 |
5 | 45 |
6 | 435 |
7 | 3465 |
8 | 24794 |
9 | 165942 |
10 | 1061730 |
11 | 6578550 |
12 | 39796053 |
13 | 236309931 |
14 | 1382504669 |
15 | 7989938775 |
16 | 45704622660 |
17 | 259155482652 |
18 | 1458298435572 |
19 | 8151155034300 |
20 | 45290328792695 |
21 | 250308998693145 |
22 | 1376766613411959 |
23 | 7539656755416885 |
24 | 41126122248463038 |
25 | 223513887538508850 |
26 | 1210707873300202550 |
27 | 6537847299012919890 |
[0,0,0,3,45,435,3465,24794,165942,1061730,6578550, 39796053,236309931,1382504669,7989938775, 45704622660,259155482652,1458298435572, 8151155034300,45290328792695,250308998693145, 1376766613411959,7539656755416885, 41126122248463038,223513887538508850, 1210707873300202550,6537847299012919890] |