n | a(n) |
---|---|
0 | 1 |
1 | 8 |
2 | 55 |
3 | 386 |
4 | 2701 |
5 | 18908 |
6 | 132355 |
7 | 926486 |
8 | 6485401 |
9 | 45397808 |
10 | 317784655 |
11 | 2224492586 |
12 | 15571448101 |
13 | 109000136708 |
14 | 763000956955 |
15 | 5341006698686 |
16 | 37387046890801 |
17 | 261709328235608 |
18 | 1831965297649255 |
19 | 12823757083544786 |
[1,8,55,386,2701,18908,132355,926486,6485401, 45397808,317784655,2224492586,15571448101, 109000136708,763000956955,5341006698686, 37387046890801,261709328235608,1831965297649255, 12823757083544786] |