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) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | -2 |
| 7 | -5 |
| 8 | -2 |
| 9 | 4 |
| 10 | 13 |
| 11 | 19 |
| 12 | -5 |
| 13 | -50 |
| 14 | -65 |
| 15 | -20 |
| 16 | 118 |
| 17 | 283 |
| 18 | 187 |
| 19 | -311 |
| 20 | -914 |
| 21 | -1001 |
| 22 | 334 |
| 23 | 3040 |
| 24 | 4405 |
| 25 | 835 |
| 26 | -8273 |
| 27 | -17030 |
| 28 | -11189 |
| 29 | 20068 |
| 30 | 60178 |
| 31 | 60427 |
| 32 | -29165 |
| 33 | -192491 |
| 34 | -274310 |
| 35 | -39845 |
| 36 | 553798 |
| 37 | 1070812 |
| 38 | 635629 |
| 39 | -1341437 |
| 40 | -3836765 |
| 41 | -3693914 |
| 42 | 2237287 |
| 43 | 12425356 |
| 44 | 16921054 |
| 45 | 1409755 |
| 46 | -36343973 |