n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 30 |
4 | 190 |
5 | 1547 |
6 | 15106 |
7 | 173502 |
8 | 2286648 |
9 | 34053437 |
10 | 565424068 |
11 | 10358963615 |
12 | 207582616995 |
13 | 4516836844067 |
14 | 106059101583274 |
15 | 2673073911292478 |
16 | 71978776046880670 |
17 | 2062324447652722085 |
18 | 62647209605811093549 |
19 | 2011144064488835839006 |
20 | 68034719732835699646658 |
[1,2,6,30,190,1547,15106,173502,2286648,34053437, 565424068,10358963615,207582616995,4516836844067, 106059101583274,2673073911292478, 71978776046880670,2062324447652722085, 62647209605811093549,2011144064488835839006, 68034719732835699646658] |