n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 30 |
5 | 180 |
6 | 1380 |
7 | 11760 |
8 | 116760 |
9 | 1288560 |
10 | 15772680 |
11 | 211217160 |
12 | 3070766160 |
13 | 48126078000 |
14 | 808938290160 |
15 | 14511273416640 |
16 | 276665518649520 |
17 | 5585442224281920 |
18 | 119014292440002960 |
19 | 2668801991050475280 |
20 | 62817503812807423680 |
21 | 1548361707766975221120 |
22 | 39881143737823187479680 |
23 | 1071331562128332368223360 |
24 | 29961996486664600243005120 |
25 | 870964354095824682016202880 |
26 | 26276077241407778648357894400 |
27 | 821576644748718055815635297280 |
[1,1,2,6,30,180,1380,11760,116760,1288560, 15772680,211217160,3070766160,48126078000, 808938290160,14511273416640,276665518649520, 5585442224281920,119014292440002960, 2668801991050475280,62817503812807423680, 1548361707766975221120,39881143737823187479680, 1071331562128332368223360, 29961996486664600243005120, 870964354095824682016202880, 26276077241407778648357894400, 821576644748718055815635297280] |