n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 20 |
3 | 180 |
4 | 816 |
5 | 2600 |
6 | 6660 |
7 | 14700 |
8 | 29120 |
9 | 53136 |
10 | 90900 |
11 | 147620 |
12 | 229680 |
13 | 344760 |
14 | 501956 |
15 | 711900 |
16 | 986880 |
17 | 1340960 |
18 | 1790100 |
19 | 2352276 |
20 | 3047600 |
21 | 3898440 |
22 | 4929540 |
23 | 6168140 |
24 | 7644096 |
25 | 9390000 |
26 | 11441300 |
[0,0,20,180,816,2600,6660,14700,29120,53136,90900, 147620,229680,344760,501956,711900,986880,1340960, 1790100,2352276,3047600,3898440,4929540,6168140, 7644096,9390000,11441300] |