n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 15 |
3 | 135 |
4 | 2244 |
5 | 63954 |
6 | 2649790 |
7 | 135954390 |
8 | 7791419142 |
9 | 471957819750 |
10 | 29387888461350 |
11 | 1855241125539750 |
12 | 117925810919637670 |
13 | 7521488030252902566 |
14 | 480553086854453064870 |
15 | 30729125540385201818790 |
16 | 1965823916539674220608678 |
[1,3,15,135,2244,63954,2649790,135954390, 7791419142,471957819750,29387888461350, 1855241125539750,117925810919637670, 7521488030252902566,480553086854453064870, 30729125540385201818790,1965823916539674220608678] |