n | a(n) |
---|---|
0 | 1 |
1 | 9 |
2 | 45 |
3 | 173 |
4 | 567 |
5 | 1654 |
6 | 4422 |
7 | 11040 |
8 | 26051 |
9 | 58638 |
10 | 126778 |
11 | 264670 |
12 | 535806 |
13 | 1055480 |
14 | 2028884 |
15 | 3814688 |
16 | 7029559 |
17 | 12717703 |
18 | 22622719 |
19 | 39618458 |
20 | 68384638 |
21 | 116456100 |
22 | 195837008 |
23 | 325462408 |
24 | 534921468 |
25 | 870044724 |
26 | 1401226327 |
27 | 2235733481 |
28 | 3535790660 |
[1,9,45,173,567,1654,4422,11040,26051,58638, 126778,264670,535806,1055480,2028884,3814688, 7029559,12717703,22622719,39618458,68384638, 116456100,195837008,325462408,534921468,870044724, 1401226327,2235733481,3535790660] |