n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 42 |
3 | 330 |
4 | 2778 |
5 | 24234 |
6 | 215034 |
7 | 1923018 |
8 | 17258010 |
9 | 155125482 |
10 | 1395342906 |
11 | 12554940426 |
12 | 112981880922 |
13 | 1016786596650 |
14 | 9150878043258 |
15 | 82357097082954 |
16 | 741210652521114 |
17 | 6670882987788138 |
18 | 60037895350485690 |
19 | 540340851995941002 |
[1,6,42,330,2778,24234,215034,1923018,17258010, 155125482,1395342906,12554940426,112981880922, 1016786596650,9150878043258,82357097082954, 741210652521114,6670882987788138, 60037895350485690,540340851995941002] |