n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 3 |
4 | 12 |
5 | 50 |
6 | 225 |
7 | 1092 |
8 | 5684 |
9 | 31572 |
10 | 186300 |
11 | 1163085 |
12 | 7654350 |
13 | 52928460 |
14 | 383437327 |
15 | 2902665885 |
16 | 22907918640 |
17 | 188082362120 |
18 | 1603461748491 |
19 | 14169892736484 |
20 | 129594593170210 |
21 | 1224875863061970 |
22 | 11948280552370932 |
23 | 120142063487658003 |
24 | 1243853543811461148 |
[0,0,1,3,12,50,225,1092,5684,31572,186300,1163085, 7654350,52928460,383437327,2902665885,22907918640, 188082362120,1603461748491,14169892736484, 129594593170210,1224875863061970, 11948280552370932,120142063487658003, 1243853543811461148] |