n | a(n) |
---|---|
3 | 1 |
4 | 3 |
5 | 9 |
6 | 34 |
7 | 125 |
8 | 473 |
9 | 1779 |
10 | 6732 |
11 | 25492 |
12 | 96927 |
13 | 369463 |
14 | 1412700 |
15 | 5415117 |
16 | 20807502 |
17 | 80120350 |
18 | 309106496 |
19 | 1194609429 |
20 | 4624160156 |
21 | 17925278497 |
22 | 69578272204 |
23 | 270401326899 |
24 | 1052036082719 |
25 | 4097343156323 |
26 | 15973179953261 |
27 | 62325892264031 |
28 | 243392644741599 |
[1,3,9,34,125,473,1779,6732,25492,96927,369463, 1412700,5415117,20807502,80120350,309106496, 1194609429,4624160156,17925278497,69578272204, 270401326899,1052036082719,4097343156323, 15973179953261,62325892264031,243392644741599] |