n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 26 |
3 | 252 |
4 | 2568 |
5 | 26928 |
6 | 287648 |
7 | 3112896 |
8 | 34013312 |
9 | 374416128 |
10 | 4145895936 |
11 | 46127840256 |
12 | 515268544512 |
13 | 5775088103424 |
14 | 64912164888576 |
15 | 731420783788032 |
16 | 8259345993203712 |
17 | 93443504499523584 |
18 | 1058972245409005568 |
19 | 12019152955622817792 |
20 | 136599995048232747008 |
[1,3,26,252,2568,26928,287648,3112896,34013312, 374416128,4145895936,46127840256,515268544512, 5775088103424,64912164888576,731420783788032, 8259345993203712,93443504499523584, 1058972245409005568,12019152955622817792, 136599995048232747008] |