n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 15 |
3 | 58 |
4 | 229 |
5 | 912 |
6 | 3643 |
7 | 14566 |
8 | 58257 |
9 | 233020 |
10 | 932071 |
11 | 3728274 |
12 | 14913085 |
13 | 59652328 |
14 | 238609299 |
15 | 954437182 |
16 | 3817748713 |
17 | 15270994836 |
18 | 61083979327 |
19 | 244335917290 |
20 | 977343669141 |
21 | 3909374676544 |
22 | 15637498706155 |
23 | 62549994824598 |
[1,4,15,58,229,912,3643,14566,58257,233020,932071, 3728274,14913085,59652328,238609299,954437182, 3817748713,15270994836,61083979327,244335917290, 977343669141,3909374676544,15637498706155, 62549994824598] |