n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 4 |
4 | 31 |
5 | 362 |
6 | 5676 |
7 | 111982 |
8 | 2666392 |
9 | 74433564 |
10 | 2384579440 |
11 | 86248530296 |
12 | 3476794472064 |
13 | 154579941792256 |
14 | 7514932528712896 |
15 | 396595845237540600 |
16 | 22581060079942183936 |
17 | 1379771773100463174608 |
18 | 90059660791562688208128 |
19 | 6253914166368448348512064 |
[1,1,1,4,31,362,5676,111982,2666392,74433564, 2384579440,86248530296,3476794472064, 154579941792256,7514932528712896, 396595845237540600,22581060079942183936, 1379771773100463174608,90059660791562688208128, 6253914166368448348512064] |