n | a(n) |
---|---|
1 | 5 |
2 | 21 |
3 | 31 |
4 | 137 |
5 | 574 |
6 | 2360 |
7 | 13498 |
8 | 83190 |
9 | 481377 |
10 | 2919477 |
11 | 18188505 |
12 | 111190231 |
13 | 681420231 |
14 | 4209030021 |
15 | 25916430566 |
16 | 159406198332 |
17 | 982241553059 |
18 | 6051046080917 |
19 | 37258819107772 |
20 | 229490403681192 |
21 | 1413605674151764 |
[5,21,31,137,574,2360,13498,83190,481377,2919477, 18188505,111190231,681420231,4209030021, 25916430566,159406198332,982241553059, 6051046080917,37258819107772,229490403681192, 1413605674151764] |