n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 31 |
4 | 283 |
5 | 3489 |
6 | 50913 |
7 | 890635 |
8 | 17891170 |
9 | 409850236 |
10 | 10494427982 |
11 | 297780829216 |
12 | 9261266862273 |
13 | 313453533534739 |
14 | 11464487066049791 |
15 | 450644378868285130 |
16 | 18942868694407904729 |
17 | 847930346323808122469 |
18 | 40266107916200371331007 |
19 | 2021842180288047801103956 |
[1,1,4,31,283,3489,50913,890635,17891170, 409850236,10494427982,297780829216,9261266862273, 313453533534739,11464487066049791, 450644378868285130,18942868694407904729, 847930346323808122469,40266107916200371331007, 2021842180288047801103956] |