n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 1 |
4 | 4 |
5 | 18 |
6 | 106 |
7 | 842 |
8 | 11094 |
9 | 261033 |
10 | 11716465 |
11 | 1006700330 |
12 | 164059829925 |
13 | 50335907867918 |
14 | 29003487462844902 |
15 | 31397381142761234219 |
16 | 63969560113225176156957 |
17 | 245871831682084026519479939 |
18 | 1787331725248899088890200452713 |
19 | 24636021429399867655322650759363689 |
[0,0,1,4,18,106,842,11094,261033,11716465, 1006700330,164059829925,50335907867918, 29003487462844902,31397381142761234219, 63969560113225176156957, 245871831682084026519479939, 1787331725248899088890200452713, 24636021429399867655322650759363689] |