n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 24 |
3 | 198 |
4 | 1272 |
5 | 7746 |
6 | 46620 |
7 | 279894 |
8 | 1679568 |
9 | 10077642 |
10 | 60466116 |
11 | 362796990 |
12 | 2176782264 |
13 | 13060693938 |
14 | 78364164012 |
15 | 470184984486 |
16 | 2821109907360 |
17 | 16926659444634 |
18 | 101559956668308 |
19 | 609359740010382 |
20 | 3656158440062856 |
21 | 21936950640377730 |
22 | 131621703842267004 |
23 | 789730223053602678 |
[1,0,24,198,1272,7746,46620,279894,1679568, 10077642,60466116,362796990,2176782264, 13060693938,78364164012,470184984486, 2821109907360,16926659444634,101559956668308, 609359740010382,3656158440062856, 21936950640377730,131621703842267004, 789730223053602678] |