n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 17 |
3 | 77 |
4 | 371 |
5 | 1891 |
6 | 10123 |
7 | 56503 |
8 | 326699 |
9 | 1945799 |
10 | 11879987 |
11 | 74039167 |
12 | 469266331 |
13 | 3014973511 |
14 | 19581735203 |
15 | 128267231663 |
16 | 845770626539 |
17 | 5605309590679 |
18 | 37293554232307 |
19 | 248855791875007 |
20 | 1664285028373691 |
21 | 11148949376158631 |
22 | 74779855705724483 |
[1,4,17,77,371,1891,10123,56503,326699,1945799, 11879987,74039167,469266331,3014973511, 19581735203,128267231663,845770626539, 5605309590679,37293554232307,248855791875007, 1664285028373691,11148949376158631, 74779855705724483] |