n | a(n) |
---|---|
0 | 1 |
1 | 66 |
2 | 1386 |
3 | 16016 |
4 | 126126 |
5 | 756756 |
6 | 3699696 |
7 | 15402816 |
8 | 56316546 |
9 | 184940756 |
10 | 554822268 |
11 | 1540663488 |
12 | 4001445448 |
13 | 9802357488 |
14 | 22805484768 |
15 | 50678855040 |
16 | 108088495515 |
17 | 222161129190 |
18 | 441579528390 |
19 | 851355545040 |
20 | 1596291646950 |
21 | 2917485413700 |
22 | 5208073135200 |
[1,66,1386,16016,126126,756756,3699696,15402816, 56316546,184940756,554822268,1540663488, 4001445448,9802357488,22805484768,50678855040, 108088495515,222161129190,441579528390, 851355545040,1596291646950,2917485413700, 5208073135200] |