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 | 9 |
| 1 | 9 |
| 2 | -9 |
| 3 | 9 |
| 4 | 9 |
| 5 | 45 |
| 6 | 63 |
| 7 | 117 |
| 8 | 153 |
| 9 | 225 |
| 10 | 279 |
| 11 | 369 |
| 12 | 441 |
| 13 | 549 |
| 14 | 639 |
| 15 | 765 |
| 16 | 873 |
| 17 | 1017 |
| 18 | 1143 |
| 19 | 1305 |
| 20 | 1449 |
| 21 | 1629 |
| 22 | 1791 |
| 23 | 1989 |
| 24 | 2169 |
| 25 | 2385 |
| 26 | 2583 |
| 27 | 2817 |
| 28 | 3033 |
| 29 | 3285 |
| 30 | 3519 |
| 31 | 3789 |
| 32 | 4041 |
| 33 | 4329 |
| 34 | 4599 |
| 35 | 4905 |
| 36 | 5193 |
| 37 | 5517 |
| 38 | 5823 |
| 39 | 6165 |
| 40 | 6489 |
| 41 | 6849 |
| 42 | 7191 |
| 43 | 7569 |
| 44 | 7929 |
| 45 | 8325 |
| 46 | 8703 |