n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 42 |
3 | 300 |
4 | 2154 |
5 | 15492 |
6 | 111492 |
7 | 802584 |
8 | 5778090 |
9 | 41600532 |
10 | 299517996 |
11 | 2156509416 |
12 | 15526797252 |
13 | 111792690600 |
14 | 804906480840 |
15 | 5795323452720 |
16 | 41726317225770 |
17 | 300429441596340 |
18 | 2163091823919900 |
19 | 15574260559056840 |
20 | 112134673904493420 |
21 | 807369644235408120 |
[1,6,42,300,2154,15492,111492,802584,5778090, 41600532,299517996,2156509416,15526797252, 111792690600,804906480840,5795323452720, 41726317225770,300429441596340,2163091823919900, 15574260559056840,112134673904493420, 807369644235408120] |