n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 6 |
4 | 24 |
5 | 320 |
6 | 3270 |
7 | 55482 |
8 | 999656 |
9 | 21718440 |
10 | 544829130 |
11 | 15130478990 |
12 | 475440344412 |
13 | 16294653237876 |
14 | 613546243029902 |
15 | 25016884214147490 |
16 | 1100408748640263120 |
17 | 51948228453097163312 |
18 | 2617775548597611727506 |
19 | 140364712844785892810646 |
20 | 7975414423897012183673540 |
[1,1,6,24,320,3270,55482,999656,21718440, 544829130,15130478990,475440344412,16294653237876, 613546243029902,25016884214147490, 1100408748640263120,51948228453097163312, 2617775548597611727506,140364712844785892810646, 7975414423897012183673540] |