n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 2 |
4 | 3 |
5 | 24 |
6 | 130 |
7 | 930 |
8 | 7413 |
9 | 66752 |
10 | 667476 |
11 | 7342290 |
12 | 88107415 |
13 | 1145396472 |
14 | 16035550518 |
15 | 240533257874 |
16 | 3848532125865 |
17 | 65425046139840 |
18 | 1177650830516968 |
19 | 22375365779822562 |
20 | 447507315596451051 |
21 | 9397653627525472280 |
22 | 206748379805560389930 |
[1,0,0,2,3,24,130,930,7413,66752,667476,7342290, 88107415,1145396472,16035550518,240533257874, 3848532125865,65425046139840,1177650830516968, 22375365779822562,447507315596451051, 9397653627525472280,206748379805560389930] |