n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 21 |
4 | 20 |
5 | 1555 |
6 | 2604 |
7 | 299593 |
8 | 820 |
9 | 29127 |
10 | 348678440 |
11 | 67546215517 |
12 | 20345052 |
13 | 61054982558011 |
14 | 281241170407092 |
15 | 76861433640456465 |
16 | 2690420 |
17 | 128583032925805678351 |
18 | 211927625868 |
19 | 275941052631578947368421 |
20 | 174339220 |
[1,4,21,20,1555,2604,299593,820,29127,348678440, 67546215517,20345052,61054982558011, 281241170407092,76861433640456465,2690420, 128583032925805678351,211927625868, 275941052631578947368421,174339220] |