n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 13 |
3 | 67 |
4 | 375 |
5 | 2189 |
6 | 13089 |
7 | 79479 |
8 | 487833 |
9 | 3018355 |
10 | 18792303 |
11 | 117589689 |
12 | 738844719 |
13 | 4658460165 |
14 | 29458662005 |
15 | 186761788579 |
16 | 1186655988771 |
17 | 7554520173441 |
18 | 48176764031385 |
19 | 307706150625855 |
20 | 1968040844127793 |
21 | 12602972755261195 |
22 | 80798365998084795 |
23 | 518536437750443773 |
[1,3,13,67,375,2189,13089,79479,487833,3018355, 18792303,117589689,738844719,4658460165, 29458662005,186761788579,1186655988771, 7554520173441,48176764031385,307706150625855, 1968040844127793,12602972755261195, 80798365998084795,518536437750443773] |