n | a(n) |
---|---|
0 | 4 |
1 | 28 |
2 | 244 |
3 | 2188 |
4 | 19684 |
5 | 177148 |
6 | 1594324 |
7 | 14348908 |
8 | 129140164 |
9 | 1162261468 |
10 | 10460353204 |
11 | 94143178828 |
12 | 847288609444 |
13 | 7625597484988 |
14 | 68630377364884 |
15 | 617673396283948 |
16 | 5559060566555524 |
17 | 50031545098999708 |
18 | 450283905890997364 |
19 | 4052555153018976268 |
20 | 36472996377170786404 |
[4,28,244,2188,19684,177148,1594324,14348908, 129140164,1162261468,10460353204,94143178828, 847288609444,7625597484988,68630377364884, 617673396283948,5559060566555524, 50031545098999708,450283905890997364, 4052555153018976268,36472996377170786404] |