n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 0 |
4 | 4 |
5 | 12 |
6 | 76 |
7 | 494 |
8 | 3662 |
9 | 30574 |
10 | 284398 |
11 | 2918924 |
12 | 32791604 |
13 | 400400062 |
14 | 5281683678 |
15 | 74866857910 |
16 | 1135063409918 |
17 | 18330526475060 |
18 | 314169905117860 |
19 | 5695984717957246 |
20 | 108921059813769710 |
21 | 2190998123920252622 |
22 | 46250325111346491694 |
[1,1,0,4,12,76,494,3662,30574,284398,2918924, 32791604,400400062,5281683678,74866857910, 1135063409918,18330526475060,314169905117860, 5695984717957246,108921059813769710, 2190998123920252622,46250325111346491694] |