n | a(n) |
---|---|
1 | 20 |
2 | 400 |
3 | 3000 |
4 | 14000 |
5 | 49000 |
6 | 141120 |
7 | 352800 |
8 | 792000 |
9 | 1633500 |
10 | 3146000 |
11 | 5725720 |
12 | 9937200 |
13 | 16562000 |
14 | 26656000 |
15 | 41616000 |
16 | 63256320 |
17 | 93896100 |
18 | 136458000 |
19 | 194579000 |
20 | 272734000 |
21 | 376372920 |
22 | 512072000 |
23 | 687700000 |
24 | 912600000 |
25 | 1197787500 |
[20,400,3000,14000,49000,141120,352800,792000, 1633500,3146000,5725720,9937200,16562000,26656000, 41616000,63256320,93896100,136458000,194579000, 272734000,376372920,512072000,687700000,912600000, 1197787500] |