n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 3 |
4 | 15 |
5 | 97 |
6 | 767 |
7 | 7175 |
8 | 77497 |
9 | 949047 |
10 | 12993303 |
11 | 196655437 |
12 | 3260367539 |
13 | 58761008087 |
14 | 1143864229549 |
15 | 23917992791139 |
16 | 534642521054391 |
17 | 12722568903456817 |
18 | 321112383611040455 |
19 | 8568150193087139231 |
20 | 240986045600284560553 |
21 | 7125677277725450247087 |
[0,1,3,15,97,767,7175,77497,949047,12993303, 196655437,3260367539,58761008087,1143864229549, 23917992791139,534642521054391,12722568903456817, 321112383611040455,8568150193087139231, 240986045600284560553,7125677277725450247087] |