n | a(n) |
---|---|
1 | 4 |
2 | 23 |
3 | 127 |
4 | 667 |
5 | 3202 |
6 | 13740 |
7 | 53575 |
8 | 192191 |
9 | 640831 |
10 | 2002960 |
11 | 5909556 |
12 | 16555375 |
13 | 44257697 |
14 | 113385871 |
15 | 279415526 |
16 | 664438386 |
17 | 1528929898 |
18 | 3412860357 |
19 | 7406164606 |
20 | 15655003700 |
21 | 32288642035 |
22 | 65081639197 |
23 | 128377414029 |
24 | 248137470904 |
[4,23,127,667,3202,13740,53575,192191,640831, 2002960,5909556,16555375,44257697,113385871, 279415526,664438386,1528929898,3412860357, 7406164606,15655003700,32288642035,65081639197, 128377414029,248137470904] |