n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 14 |
4 | 44 |
5 | 134 |
6 | 400 |
7 | 1184 |
8 | 3488 |
9 | 10253 |
10 | 30108 |
11 | 88386 |
12 | 259492 |
13 | 762085 |
14 | 2239120 |
15 | 6582280 |
16 | 19360432 |
17 | 56976859 |
18 | 167774428 |
19 | 494301778 |
20 | 1457104948 |
21 | 4297477252 |
22 | 12680944960 |
23 | 37436553544 |
24 | 110569987344 |
25 | 326713395019 |
26 | 965775778420 |
[1,4,14,44,134,400,1184,3488,10253,30108,88386, 259492,762085,2239120,6582280,19360432,56976859, 167774428,494301778,1457104948,4297477252, 12680944960,37436553544,110569987344,326713395019, 965775778420] |