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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 | -127 |
| 3 | -2186 |
| 4 | -16383 |
| 5 | -78124 |
| 6 | -279935 |
| 7 | -823542 |
| 8 | -2097151 |
| 9 | -4782968 |
| 10 | -9999999 |
| 11 | -19487170 |
| 12 | -35831807 |
| 13 | -62748516 |
| 14 | -105413503 |
| 15 | -170859374 |
| 16 | -268435455 |
| 17 | -410338672 |
| 18 | -612220031 |
| 19 | -893871738 |
| 20 | -1279999999 |
[1,0,-127,-2186,-16383,-78124,-279935,-823542, -2097151,-4782968,-9999999,-19487170,-35831807, -62748516,-105413503,-170859374,-268435455, -410338672,-612220031,-893871738,-1279999999] |