n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 9 |
4 | 40 |
5 | 360 |
6 | 2480 |
7 | 28833 |
8 | 266936 |
9 | 3562920 |
10 | 45634258 |
11 | 659631225 |
12 | 10231705196 |
13 | 176661237948 |
14 | 3080315922294 |
15 | 59430009554685 |
16 | 1217593208993232 |
17 | 25766943601055184 |
18 | 583245289316927058 |
19 | 13861911731632256457 |
20 | 343615639889119016556 |
21 | 8925102256331257339140 |
22 | 242399591002192962709230 |
[1,0,2,9,40,360,2480,28833,266936,3562920, 45634258,659631225,10231705196,176661237948, 3080315922294,59430009554685,1217593208993232, 25766943601055184,583245289316927058, 13861911731632256457,343615639889119016556, 8925102256331257339140,242399591002192962709230] |