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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 6 |
| 4 | 48 |
| 5 | 240 |
| 6 | 960 |
| 7 | 3150 |
| 8 | 8736 |
| 9 | 21168 |
| 10 | 46080 |
| 11 | 92070 |
| 12 | 171600 |
| 13 | 302016 |
| 14 | 506688 |
| 15 | 816270 |
| 16 | 1270080 |
| 17 | 1917600 |
| 18 | 2820096 |
| 19 | 4052358 |
| 20 | 5704560 |
| 21 | 7884240 |
| 22 | 10718400 |
| 23 | 14355726 |
| 24 | 18968928 |
| 25 | 24757200 |
| 26 | 31948800 |
| 27 | 40803750 |
| 28 | 51616656 |
| 29 | 64719648 |
| 30 | 80485440 |
| 31 | 99330510 |
| 32 | 121718400 |
| 33 | 148163136 |
| 34 | 179232768 |
| 35 | 215553030 |
[0,0,0,6,48,240,960,3150,8736,21168,46080,92070, 171600,302016,506688,816270,1270080,1917600, 2820096,4052358,5704560,7884240,10718400,14355726, 18968928,24757200,31948800,40803750,51616656, 64719648,80485440,99330510,121718400,148163136, 179232768,215553030] |