n | a(n) |
---|---|
0 | 4 |
1 | 17 |
2 | 140 |
3 | 577 |
4 | 4756 |
5 | 19601 |
6 | 161564 |
7 | 665857 |
8 | 5488420 |
9 | 22619537 |
10 | 186444716 |
11 | 768398401 |
12 | 6333631924 |
13 | 26102926097 |
14 | 215157040700 |
15 | 886731088897 |
16 | 7309005751876 |
17 | 30122754096401 |
18 | 248291038523084 |
[4,17,140,577,4756,19601,161564,665857,5488420, 22619537,186444716,768398401,6333631924, 26102926097,215157040700,886731088897, 7309005751876,30122754096401,248291038523084] |