n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 6 |
4 | 240 |
5 | 1010 |
6 | 4056 |
7 | 12068 |
8 | 30000 |
9 | 65628 |
10 | 130480 |
11 | 240856 |
12 | 418968 |
13 | 694200 |
14 | 1104488 |
15 | 1697820 |
16 | 2533856 |
17 | 3685668 |
18 | 5241600 |
19 | 7307248 |
20 | 10007560 |
21 | 13489056 |
22 | 17922168 |
23 | 23503700 |
24 | 30459408 |
25 | 39046700 |
26 | 49557456 |
27 | 62320968 |
28 | 77707000 |
29 | 96128968 |
30 | 118047240 |
31 | 143972556 |
[0,0,6,240,1010,4056,12068,30000,65628,130480, 240856,418968,694200,1104488,1697820,2533856, 3685668,5241600,7307248,10007560,13489056, 17922168,23503700,30459408,39046700,49557456, 62320968,77707000,96128968,118047240,143972556] |