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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 6 |
| 4 | 24 |
| 5 | 66 |
| 6 | 120 |
| 7 | 198 |
| 8 | 288 |
| 9 | 402 |
| 10 | 528 |
| 11 | 678 |
| 12 | 840 |
| 13 | 1026 |
| 14 | 1224 |
| 15 | 1446 |
| 16 | 1680 |
| 17 | 1938 |
| 18 | 2208 |
| 19 | 2502 |
| 20 | 2808 |
| 21 | 3138 |
| 22 | 3480 |
| 23 | 3846 |
| 24 | 4224 |
| 25 | 4626 |
| 26 | 5040 |
| 27 | 5478 |
| 28 | 5928 |
| 29 | 6402 |
| 30 | 6888 |
| 31 | 7398 |
| 32 | 7920 |
| 33 | 8466 |
| 34 | 9024 |
| 35 | 9606 |
| 36 | 10200 |
| 37 | 10818 |
| 38 | 11448 |
| 39 | 12102 |
| 40 | 12768 |
| 41 | 13458 |
| 42 | 14160 |
| 43 | 14886 |
| 44 | 15624 |
[0,0,6,24,66,120,198,288,402,528,678,840,1026, 1224,1446,1680,1938,2208,2502,2808,3138,3480,3846, 4224,4626,5040,5478,5928,6402,6888,7398,7920,8466, 9024,9606,10200,10818,11448,12102,12768,13458, 14160,14886,15624] |