n | a(n) |
---|---|
0 | 1 |
1 | 18 |
2 | 215 |
3 | 2160 |
4 | 19821 |
5 | 172638 |
6 | 1456915 |
7 | 12056220 |
8 | 98541641 |
9 | 799142058 |
10 | 6448579215 |
11 | 51871439880 |
12 | 416407919461 |
13 | 3338534836278 |
14 | 26744994007115 |
15 | 214144960297140 |
16 | 1714090450201281 |
17 | 13717400347223298 |
18 | 109762678131820615 |
[1,18,215,2160,19821,172638,1456915,12056220, 98541641,799142058,6448579215,51871439880, 416407919461,3338534836278,26744994007115, 214144960297140,1714090450201281, 13717400347223298,109762678131820615] |