n | a(n) |
---|---|
0 | 1 |
1 | 15 |
2 | 113 |
3 | 799 |
4 | 5601 |
5 | 39215 |
6 | 274513 |
7 | 1921599 |
8 | 13451201 |
9 | 94158415 |
10 | 659108913 |
11 | 4613762399 |
12 | 32296336801 |
13 | 226074357615 |
14 | 1582520503313 |
15 | 11077643523199 |
16 | 77543504662401 |
17 | 542804532636815 |
18 | 3799631728457713 |
19 | 26597422099203999 |
20 | 186181954694428001 |
[1,15,113,799,5601,39215,274513,1921599,13451201, 94158415,659108913,4613762399,32296336801, 226074357615,1582520503313,11077643523199, 77543504662401,542804532636815,3799631728457713, 26597422099203999,186181954694428001] |