n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 0 |
3 | 6 |
4 | 36 |
5 | 380 |
6 | 4830 |
7 | 74382 |
8 | 1342712 |
9 | 27825912 |
10 | 651274650 |
11 | 16994464850 |
12 | 489240628932 |
13 | 15404364096420 |
14 | 526634857318934 |
15 | 19428038813967630 |
16 | 769280055136105200 |
17 | 32543192449030871792 |
18 | 1464827827285673677746 |
19 | 69903432558329996409642 |
20 | 3525344776953738276010940 |
[0,1,0,6,36,380,4830,74382,1342712,27825912, 651274650,16994464850,489240628932,15404364096420, 526634857318934,19428038813967630, 769280055136105200,32543192449030871792, 1464827827285673677746,69903432558329996409642, 3525344776953738276010940] |