n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 3 |
4 | 19 |
5 | 132 |
6 | 991 |
7 | 7740 |
8 | 62020 |
9 | 505857 |
10 | 4180132 |
11 | 34889514 |
12 | 293518072 |
13 | 2485191753 |
14 | 21153817090 |
15 | 180865139538 |
16 | 1552289627872 |
17 | 13366436688402 |
18 | 115425148203235 |
19 | 999256943147094 |
20 | 8670047414816233 |
21 | 75375298322580081 |
22 | 656465004512563546 |
[1,0,1,3,19,132,991,7740,62020,505857,4180132, 34889514,293518072,2485191753,21153817090, 180865139538,1552289627872,13366436688402, 115425148203235,999256943147094,8670047414816233, 75375298322580081,656465004512563546] |