n | a(n) |
---|---|
1 | 1 |
2 | 6 |
3 | 50 |
4 | 394 |
5 | 3120 |
6 | 24922 |
7 | 200676 |
8 | 1627434 |
9 | 13282008 |
10 | 109014050 |
11 | 899304906 |
12 | 7452793766 |
13 | 62019712684 |
14 | 518052932358 |
15 | 4342182907626 |
16 | 36509428285466 |
17 | 307859922637008 |
18 | 2602876165613074 |
19 | 22060637925756358 |
20 | 187399432888840254 |
21 | 1595268339755117256 |
[1,6,50,394,3120,24922,200676,1627434,13282008, 109014050,899304906,7452793766,62019712684, 518052932358,4342182907626,36509428285466, 307859922637008,2602876165613074, 22060637925756358,187399432888840254, 1595268339755117256] |