n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 9 |
4 | 33 |
5 | 28 |
6 | 165 |
7 | 54 |
8 | 1029 |
9 | 40832 |
10 | 31752 |
11 | 28680 |
12 | 2588680 |
13 | 2162700 |
14 | 12996613 |
15 | 12341252 |
16 | 4516741125 |
17 | 500367376 |
18 | 133207162881 |
19 | 93770874890 |
20 | 7043274506259 |
21 | 40985291653137 |
22 | 70766492123145 |
23 | 321901427163142 |
24 | 58731756479578128 |
25 | 676814631896875010 |
26 | 6820060161969750025 |
[1,4,9,33,28,165,54,1029,40832,31752,28680, 2588680,2162700,12996613,12341252,4516741125, 500367376,133207162881,93770874890,7043274506259, 40985291653137,70766492123145,321901427163142, 58731756479578128,676814631896875010, 6820060161969750025] |