n | a(n) |
---|---|
1 | 4 |
2 | 20 |
3 | 96 |
4 | 436 |
5 | 1880 |
6 | 7836 |
7 | 32032 |
8 | 129572 |
9 | 521256 |
10 | 2091052 |
11 | 8376368 |
12 | 33529908 |
13 | 134168632 |
14 | 536772668 |
15 | 2147287104 |
16 | 8589541444 |
17 | 34358952008 |
18 | 137437380684 |
19 | 549752668240 |
20 | 2199016964180 |
21 | 8796080439384 |
22 | 35184346923100 |
23 | 140737438023776 |
[4,20,96,436,1880,7836,32032,129572,521256, 2091052,8376368,33529908,134168632,536772668, 2147287104,8589541444,34358952008,137437380684, 549752668240,2199016964180,8796080439384, 35184346923100,140737438023776] |