n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 24 |
3 | 176 |
4 | 1492 |
5 | 14220 |
6 | 149812 |
7 | 1724760 |
8 | 21519108 |
9 | 289101836 |
10 | 4160750192 |
11 | 63873461064 |
12 | 1042061108096 |
13 | 18008563271632 |
14 | 328712410879632 |
15 | 6320649807989400 |
16 | 127724091041379492 |
17 | 2706397280528315148 |
[1,4,24,176,1492,14220,149812,1724760,21519108, 289101836,4160750192,63873461064,1042061108096, 18008563271632,328712410879632,6320649807989400, 127724091041379492,2706397280528315148] |