n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 5 |
3 | 31 |
4 | 145 |
5 | 1181 |
6 | 9661 |
7 | 77155 |
8 | 794081 |
9 | 8132185 |
10 | 86715541 |
11 | 1055208551 |
12 | 12921555505 |
13 | 166589628661 |
14 | 2320023320525 |
15 | 32814550442731 |
16 | 486870347843521 |
17 | 7598251948512305 |
18 | 121035455085677221 |
19 | 2008950533339620015 |
20 | 34595064617371963601 |
21 | 609252363677557660621 |
[1,1,5,31,145,1181,9661,77155,794081,8132185, 86715541,1055208551,12921555505,166589628661, 2320023320525,32814550442731,486870347843521, 7598251948512305,121035455085677221, 2008950533339620015,34595064617371963601, 609252363677557660621] |