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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | -3 |
| 3 | -3 |
| 4 | -6 |
| 5 | -12 |
| 6 | -27 |
| 7 | -63 |
| 8 | -153 |
| 9 | -381 |
| 10 | -969 |
| 11 | -2505 |
| 12 | -6564 |
| 13 | -17394 |
| 14 | -46533 |
| 15 | -125505 |
| 16 | -340902 |
| 17 | -931716 |
| 18 | -2560401 |
| 19 | -7070337 |
| 20 | -19609146 |
| 21 | -54597852 |
| 22 | -152556057 |
| 23 | -427642677 |
| 24 | -1202289669 |
| 25 | -3389281245 |
| 26 | -9578183391 |
| 27 | -27130207503 |
| 28 | -77009455428 |
| 29 | -219023318406 |
[1,0,-3,-3,-6,-12,-27,-63,-153,-381,-969,-2505, -6564,-17394,-46533,-125505,-340902,-931716, -2560401,-7070337,-19609146,-54597852,-152556057, -427642677,-1202289669,-3389281245,-9578183391, -27130207503,-77009455428,-219023318406] |