| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 2 |
| 4 | 8 |
| 5 | 20 |
| 6 | 40 |
| 7 | 70 |
| 8 | 112 |
| 9 | 168 |
| 10 | 240 |
| 11 | 330 |
| 12 | 440 |
| 13 | 572 |
| 14 | 728 |
| 15 | 910 |
| 16 | 1120 |
| 17 | 1360 |
| 18 | 1632 |
| 19 | 1938 |
| 20 | 2280 |
| 21 | 2660 |
| 22 | 3080 |
| 23 | 3542 |
| 24 | 4048 |
| 25 | 4600 |
| 26 | 5200 |
| 27 | 5850 |
| 28 | 6552 |
| 29 | 7308 |
| 30 | 8120 |
| 31 | 8990 |
| 32 | 9920 |
| 33 | 10912 |
| 34 | 11968 |
| 35 | 13090 |
| 36 | 14280 |
| 37 | 15540 |
| 38 | 16872 |
| 39 | 18278 |
| 40 | 19760 |
| 41 | 21320 |
| 42 | 22960 |
| 43 | 24682 |
| 44 | 26488 |
| 45 | 28380 |
| 46 | 30360 |
| 47 | 32430 |
| 48 | 34592 |
| 49 | 36848 |
| 50 | 39200 |
[0,0,0,2,8,20,40,70,112,168,240,330,440,572,728, 910,1120,1360,1632,1938,2280,2660,3080,3542,4048, 4600,5200,5850,6552,7308,8120,8990,9920,10912, 11968,13090,14280,15540,16872,18278,19760,21320, 22960,24682,26488,28380,30360,32430,34592,36848, 39200] |