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) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 1 |
| 4 | 1 |
| 5 | 0 |
| 6 | -4 |
| 7 | -7 |
| 8 | -11 |
| 9 | -11 |
| 10 | 13 |
| 11 | 62 |
| 12 | 150 |
| 13 | 249 |
| 14 | 119 |
| 15 | -563 |
| 16 | -2363 |
| 17 | -5600 |
| 18 | -7266 |
| 19 | 1179 |
| 20 | 38987 |
| 21 | 134187 |
| 22 | 264975 |
| 23 | 242574 |
| 24 | -537166 |
| 25 | -3355093 |
| 26 | -9184543 |
| 27 | -14763745 |
| 28 | -1871761 |
| 29 | 82005564 |
| 30 | 320803682 |
| 31 | 719424797 |
| 32 | 771834105 |
| 33 | -1606327251 |
| 34 | -11230437711 |
| 35 | -33532606418 |