n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 15 |
3 | 470 |
4 | 18390 |
5 | 805806 |
6 | 37828981 |
7 | 1860433080 |
8 | 94614523740 |
9 | 4935081398830 |
10 | 262560448214031 |
11 | 14193030016877406 |
12 | 777315341935068820 |
13 | 43039297954660894560 |
14 | 2405249540028525971070 |
15 | 135492504636185052358656 |
[1,1,15,470,18390,805806,37828981,1860433080, 94614523740,4935081398830,262560448214031, 14193030016877406,777315341935068820, 43039297954660894560,2405249540028525971070, 135492504636185052358656] |