This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 3 | 0 |
| 4 | -5 |
| 5 | 9 |
| 6 | -21 |
| 7 | 34 |
| 8 | -57 |
| 9 | 83 |
| 10 | -121 |
| 11 | 164 |
| 12 | -221 |
| 13 | 285 |
| 14 | -365 |
| 15 | 454 |
| 16 | -561 |
| 17 | 679 |
| 18 | -817 |
| 19 | 968 |
| 20 | -1141 |
| 21 | 1329 |
| 22 | -1541 |
| 23 | 1770 |
| 24 | -2025 |
| 25 | 2299 |
| 26 | -2601 |
| 27 | 2924 |
| 28 | -3277 |
| 29 | 3653 |
| 30 | -4061 |
| 31 | 4494 |
| 32 | -4961 |
| 33 | 5455 |
| 34 | -5985 |
| 35 | 6544 |
| 36 | -7141 |
| 37 | 7769 |
| 38 | -8437 |
| 39 | 9138 |
| 40 | -9881 |
| 41 | 10659 |
| 42 | -11481 |
| 43 | 12340 |
| 44 | -13245 |
| 45 | 14189 |