n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 19 |
3 | 173 |
4 | 1860 |
5 | 21814 |
6 | 271388 |
7 | 3515330 |
8 | 46906860 |
9 | 640321565 |
10 | 8899950644 |
11 | 125524292790 |
12 | 1791943900656 |
13 | 25843064347685 |
14 | 375956017001280 |
15 | 5510454405453368 |
16 | 81297696816798684 |
17 | 1206334991431968912 |
18 | 17991734573723974384 |
19 | 269560224872407933010 |
[1,4,19,173,1860,21814,271388,3515330,46906860, 640321565,8899950644,125524292790,1791943900656, 25843064347685,375956017001280,5510454405453368, 81297696816798684,1206334991431968912, 17991734573723974384,269560224872407933010] |