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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 24 |
| 4 | 328 |
| 5 | 1720 |
| 6 | 5816 |
| 7 | 15424 |
| 8 | 34736 |
| 9 | 69776 |
| 10 | 128528 |
| 11 | 221448 |
| 12 | 361528 |
| 13 | 564872 |
| 14 | 850696 |
| 15 | 1241968 |
| 16 | 1765344 |
| 17 | 2451872 |
| 18 | 3336864 |
| 19 | 4460664 |
| 20 | 5868456 |
| 21 | 7611096 |
| 22 | 9744856 |
| 23 | 12332320 |
| 24 | 15442064 |
| 25 | 19149616 |
| 26 | 23537072 |
| 27 | 28694120 |
| 28 | 34717592 |
| 29 | 41712552 |
| 30 | 49791784 |
[0,0,24,328,1720,5816,15424,34736,69776,128528, 221448,361528,564872,850696,1241968,1765344, 2451872,3336864,4460664,5868456,7611096,9744856, 12332320,15442064,19149616,23537072,28694120, 34717592,41712552,49791784] |