n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 11 |
4 | 31 |
5 | 88 |
6 | 249 |
7 | 705 |
8 | 1996 |
9 | 5651 |
10 | 15999 |
11 | 45296 |
12 | 128241 |
13 | 363073 |
14 | 1027924 |
15 | 2910235 |
16 | 8239391 |
17 | 23327176 |
18 | 66043369 |
19 | 186980481 |
20 | 529374876 |
21 | 1498754083 |
22 | 4243238399 |
23 | 12013359840 |
24 | 34011950561 |
25 | 96293859201 |
26 | 272624979364 |
27 | 771849627691 |
28 | 2185243073311 |
29 | 6186810381368 |
[1,1,4,11,31,88,249,705,1996,5651,15999,45296, 128241,363073,1027924,2910235,8239391,23327176, 66043369,186980481,529374876,1498754083, 4243238399,12013359840,34011950561,96293859201, 272624979364,771849627691,2185243073311, 6186810381368] |