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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | -1 |
| 2 | 4 |
| 3 | 21 |
| 4 | 56 |
| 5 | 115 |
| 6 | 204 |
| 7 | 329 |
| 8 | 496 |
| 9 | 711 |
| 10 | 980 |
| 11 | 1309 |
| 12 | 1704 |
| 13 | 2171 |
| 14 | 2716 |
| 15 | 3345 |
| 16 | 4064 |
| 17 | 4879 |
| 18 | 5796 |
| 19 | 6821 |
| 20 | 7960 |
| 21 | 9219 |
| 22 | 10604 |
| 23 | 12121 |
| 24 | 13776 |
| 25 | 15575 |
| 26 | 17524 |
| 27 | 19629 |
| 28 | 21896 |
| 29 | 24331 |
| 30 | 26940 |
| 31 | 29729 |
| 32 | 32704 |
| 33 | 35871 |
| 34 | 39236 |
| 35 | 42805 |
| 36 | 46584 |
| 37 | 50579 |
| 38 | 54796 |
| 39 | 59241 |
| 40 | 63920 |
| 41 | 68839 |
| 42 | 74004 |
| 43 | 79421 |
| 44 | 85096 |
| 45 | 91035 |
[0,-1,4,21,56,115,204,329,496,711,980,1309,1704, 2171,2716,3345,4064,4879,5796,6821,7960,9219, 10604,12121,13776,15575,17524,19629,21896,24331, 26940,29729,32704,35871,39236,42805,46584,50579, 54796,59241,63920,68839,74004,79421,85096,91035] |