n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 12 |
4 | 60 |
5 | 355 |
6 | 2380 |
7 | 17430 |
8 | 134190 |
9 | 1027656 |
10 | 6922146 |
11 | 21248073 |
12 | -601744143 |
13 | -20802115620 |
14 | -480211746300 |
15 | -9737801866650 |
16 | -183103121602830 |
17 | -3185750996194910 |
18 | -48580593174777092 |
19 | -515943195216679230 |
20 | 3196232280583478136 |
21 | 460669417734237239892 |
[1,1,3,12,60,355,2380,17430,134190,1027656, 6922146,21248073,-601744143,-20802115620, -480211746300,-9737801866650,-183103121602830, -3185750996194910,-48580593174777092, -515943195216679230,3196232280583478136, 460669417734237239892] |