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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | -3 |
| 2 | -18 |
| 3 | -45 |
| 4 | -192 |
| 5 | -459 |
| 6 | -1914 |
| 7 | -4557 |
| 8 | -18960 |
| 9 | -45123 |
| 10 | -187698 |
| 11 | -446685 |
| 12 | -1858032 |
| 13 | -4421739 |
| 14 | -18392634 |
| 15 | -43770717 |
| 16 | -182068320 |
| 17 | -433285443 |
| 18 | -1802290578 |
| 19 | -4289083725 |
| 20 | -17840837472 |
| 21 | -42457551819 |
| 22 | -176606084154 |
| 23 | -420286434477 |
| 24 | -1748220004080 |
| 25 | -4160406792963 |
[0,-3,-18,-45,-192,-459,-1914,-4557,-18960,-45123, -187698,-446685,-1858032,-4421739,-18392634, -43770717,-182068320,-433285443,-1802290578, -4289083725,-17840837472,-42457551819, -176606084154,-420286434477,-1748220004080, -4160406792963] |