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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 6 |
| 6 | 18 |
| 7 | 44 |
| 8 | 88 |
| 9 | 159 |
| 10 | 265 |
| 11 | 416 |
| 12 | 625 |
| 13 | 903 |
| 14 | 1264 |
| 15 | 1724 |
| 16 | 2298 |
| 17 | 3006 |
| 18 | 3865 |
| 19 | 4896 |
| 20 | 6120 |
| 21 | 7560 |
| 22 | 9240 |
| 23 | 11185 |
| 24 | 13422 |
| 25 | 15978 |
| 26 | 18884 |
| 27 | 22168 |
| 28 | 25863 |
| 29 | 30001 |
| 30 | 34616 |
| 31 | 39745 |
| 32 | 45423 |
| 33 | 51688 |
| 34 | 58580 |
| 35 | 66138 |
| 36 | 74406 |
| 37 | 83425 |
| 38 | 93240 |
| 39 | 103896 |
| 40 | 115440 |
| 41 | 127920 |
| 42 | 141385 |
[0,0,0,0,1,6,18,44,88,159,265,416,625,903,1264, 1724,2298,3006,3865,4896,6120,7560,9240,11185, 13422,15978,18884,22168,25863,30001,34616,39745, 45423,51688,58580,66138,74406,83425,93240,103896, 115440,127920,141385] |