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 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 5 |
| 4 | 10 |
| 5 | 20 |
| 6 | 21 |
| 7 | -27 |
| 8 | -201 |
| 9 | -626 |
| 10 | -1486 |
| 11 | -3035 |
| 12 | -5608 |
| 13 | -9632 |
| 14 | -15637 |
| 15 | -24267 |
| 16 | -36291 |
| 17 | -52614 |
| 18 | -74288 |
| 19 | -102523 |
| 20 | -138698 |
| 21 | -184372 |
| 22 | -241295 |
| 23 | -311419 |
| 24 | -396909 |
| 25 | -500154 |
| 26 | -623778 |
| 27 | -770651 |
| 28 | -943900 |
| 29 | -1146920 |
| 30 | -1383385 |
| 31 | -1657259 |
| 32 | -1972807 |