n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 8 |
3 | 67 |
4 | 560 |
5 | 4681 |
6 | 39128 |
7 | 327067 |
8 | 2733920 |
9 | 22852561 |
10 | 191022248 |
11 | 1596735667 |
12 | 13346952080 |
13 | 111565823641 |
14 | 932567445368 |
15 | 7795237033867 |
16 | 65159598607040 |
17 | 544662499957921 |
18 | 4552778795484488 |
19 | 38056217863749667 |
20 | 318108079296450800 |
21 | 2659033287962855401 |
22 | 22226590541592195608 |
[0,1,8,67,560,4681,39128,327067,2733920,22852561, 191022248,1596735667,13346952080,111565823641, 932567445368,7795237033867,65159598607040, 544662499957921,4552778795484488, 38056217863749667,318108079296450800, 2659033287962855401,22226590541592195608] |