n | a(n) |
---|---|
1 | 0 |
2 | 3 |
3 | 19 |
4 | 136 |
5 | 935 |
6 | 6381 |
7 | 43478 |
8 | 296105 |
9 | 2016307 |
10 | 13729364 |
11 | 93484479 |
12 | 636542307 |
13 | 4334257038 |
14 | 29512224731 |
15 | 200950553535 |
16 | 1368284654492 |
17 | 9316734157423 |
18 | 63438214373401 |
19 | 431954692843542 |
20 | 2941205998493005 |
21 | 20026852048660187 |
[0,3,19,136,935,6381,43478,296105,2016307, 13729364,93484479,636542307,4334257038, 29512224731,200950553535,1368284654492, 9316734157423,63438214373401,431954692843542, 2941205998493005,20026852048660187] |