n | a(n) |
---|---|
0 | 4 |
1 | 25 |
2 | 156 |
3 | 973 |
4 | 6069 |
5 | 37855 |
6 | 236118 |
7 | 1472770 |
8 | 9186303 |
9 | 57298942 |
10 | 357398265 |
11 | 2229247441 |
12 | 13904779737 |
13 | 86730120658 |
14 | 540973246008 |
15 | 3374283935917 |
16 | 21046867223484 |
17 | 131278407014845 |
18 | 818840161120305 |
19 | 5107459975407127 |
20 | 31857435234607602 |
21 | 198708591866413654 |
[4,25,156,973,6069,37855,236118,1472770,9186303, 57298942,357398265,2229247441,13904779737, 86730120658,540973246008,3374283935917, 21046867223484,131278407014845,818840161120305, 5107459975407127,31857435234607602, 198708591866413654] |