n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 19 |
3 | 94 |
4 | 481 |
5 | 2524 |
6 | 13483 |
7 | 72958 |
8 | 398593 |
9 | 2193844 |
10 | 12146179 |
11 | 67570078 |
12 | 377393953 |
13 | 2114900428 |
14 | 11885772379 |
15 | 66963572734 |
16 | 378082854913 |
17 | 2138752086628 |
18 | 12118975586803 |
19 | 68774144872414 |
20 | 390815720696161 |
21 | 2223564321341884 |
[1,4,19,94,481,2524,13483,72958,398593,2193844, 12146179,67570078,377393953,2114900428, 11885772379,66963572734,378082854913, 2138752086628,12118975586803,68774144872414, 390815720696161,2223564321341884] |