n | a(n) |
---|---|
1 | 4 |
2 | 13 |
3 | 20 |
4 | 44 |
5 | 123 |
6 | 343 |
7 | 973 |
8 | 2774 |
9 | 7993 |
10 | 23110 |
11 | 66714 |
12 | 192997 |
13 | 558501 |
14 | 1615967 |
15 | 4676936 |
16 | 13536345 |
17 | 39177448 |
18 | 113393194 |
19 | 328199369 |
20 | 949923737 |
21 | 2749424053 |
22 | 7957828042 |
23 | 23032842153 |
24 | 66665439494 |
25 | 192954061684 |
26 | 558479378315 |
[4,13,20,44,123,343,973,2774,7993,23110,66714, 192997,558501,1615967,4676936,13536345,39177448, 113393194,328199369,949923737,2749424053, 7957828042,23032842153,66665439494,192954061684, 558479378315] |