n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 12 |
5 | 64 |
6 | 402 |
7 | 2972 |
8 | 24884 |
9 | 233224 |
10 | 2413402 |
11 | 27321706 |
12 | 335811420 |
13 | 4453678055 |
14 | 63403359154 |
15 | 964550068984 |
16 | 15618677100569 |
17 | 268256266076840 |
18 | 4871672594496080 |
19 | 93282009271337370 |
20 | 1878417037286803586 |
21 | 39686436905680824542 |
22 | 877842387051165865980 |
[1,1,3,12,64,402,2972,24884,233224,2413402, 27321706,335811420,4453678055,63403359154, 964550068984,15618677100569,268256266076840, 4871672594496080,93282009271337370, 1878417037286803586,39686436905680824542, 877842387051165865980] |