n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 9 |
4 | 36 |
5 | 100 |
6 | 400 |
7 | 1225 |
8 | 4900 |
9 | 15876 |
10 | 63504 |
11 | 213444 |
12 | 853776 |
13 | 2944656 |
14 | 11778624 |
15 | 41409225 |
16 | 165636900 |
17 | 590976100 |
18 | 2363904400 |
19 | 8533694884 |
20 | 34134779536 |
21 | 124408576656 |
22 | 497634306624 |
23 | 1828114918084 |
[1,1,4,9,36,100,400,1225,4900,15876,63504,213444, 853776,2944656,11778624,41409225,165636900, 590976100,2363904400,8533694884,34134779536, 124408576656,497634306624,1828114918084] |