n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 27 |
5 | 159 |
6 | 1154 |
7 | 9968 |
8 | 99861 |
9 | 1138234 |
10 | 14544650 |
11 | 205927012 |
12 | 3199714508 |
13 | 54131864317 |
14 | 990455375968 |
15 | 19488387266842 |
16 | 410328328297512 |
17 | 9205128127109576 |
18 | 219191041679766542 |
19 | 5521387415218119528 |
20 | 146689867860276432637 |
21 | 4099255234885039058842 |
22 | 120199458455807733040338 |
[1,1,2,6,27,159,1154,9968,99861,1138234,14544650, 205927012,3199714508,54131864317,990455375968, 19488387266842,410328328297512,9205128127109576, 219191041679766542,5521387415218119528, 146689867860276432637,4099255234885039058842, 120199458455807733040338] |