n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 3 |
3 | 13 |
4 | 55 |
5 | 445 |
6 | 7121 |
7 | 113947 |
8 | 3646325 |
9 | 99147089 |
10 | 2050446459 |
11 | 125018193357 |
12 | 5616378432777 |
13 | 30417995237783 |
14 | 6566814307004221 |
15 | 383349575034664217 |
16 | 5168339287595575151 |
17 | 549730084897741831651 |
18 | 22737447826678001578373 |
[0,1,3,13,55,445,7121,113947,3646325,99147089, 2050446459,125018193357,5616378432777, 30417995237783,6566814307004221, 383349575034664217,5168339287595575151, 549730084897741831651,22737447826678001578373] |