n | a(n) |
---|---|
0 | 0 |
1 | 15 |
2 | 180 |
3 | 1050 |
4 | 4200 |
5 | 13230 |
6 | 35280 |
7 | 83160 |
8 | 178200 |
9 | 353925 |
10 | 660660 |
11 | 1171170 |
12 | 1987440 |
13 | 3248700 |
14 | 5140800 |
15 | 7907040 |
16 | 11860560 |
17 | 17398395 |
18 | 25017300 |
19 | 35331450 |
20 | 49092120 |
21 | 67209450 |
22 | 90776400 |
23 | 121095000 |
24 | 159705000 |
25 | 208415025 |
26 | 269336340 |
27 | 344919330 |
28 | 437992800 |
29 | 551806200 |
[0,15,180,1050,4200,13230,35280,83160,178200, 353925,660660,1171170,1987440,3248700,5140800, 7907040,11860560,17398395,25017300,35331450, 49092120,67209450,90776400,121095000,159705000, 208415025,269336340,344919330,437992800,551806200] |