n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 54 |
4 | 1208 |
5 | 37810 |
6 | 1521252 |
7 | 74800558 |
8 | 4346473840 |
9 | 291409650378 |
10 | 22142153337500 |
11 | 1880332153123270 |
12 | 176486211108436968 |
13 | 18142303135426278562 |
14 | 2027140583610836224468 |
15 | 244622970048028087152990 |
16 | 31706140285613089502561504 |
17 | 4392907300768938557656691194 |
18 | 647905974466168686991684285836 |
[1,4,54,1208,37810,1521252,74800558,4346473840, 291409650378,22142153337500,1880332153123270, 176486211108436968,18142303135426278562, 2027140583610836224468,244622970048028087152990, 31706140285613089502561504, 4392907300768938557656691194, 647905974466168686991684285836] |