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 | 3 |
| 2 | -1 |
| 3 | 13 |
| 4 | -9 |
| 5 | 29 |
| 6 | -23 |
| 7 | 51 |
| 8 | -43 |
| 9 | 79 |
| 10 | -69 |
| 11 | 113 |
| 12 | -101 |
| 13 | 153 |
| 14 | -139 |
| 15 | 199 |
| 16 | -183 |
| 17 | 251 |
| 18 | -233 |
| 19 | 309 |
| 20 | -289 |
| 21 | 373 |
| 22 | -351 |
| 23 | 443 |
| 24 | -419 |
| 25 | 519 |
| 26 | -493 |
| 27 | 601 |
| 28 | -573 |
| 29 | 689 |
| 30 | -659 |
| 31 | 783 |
| 32 | -751 |
| 33 | 883 |
| 34 | -849 |
| 35 | 989 |
| 36 | -953 |
| 37 | 1101 |
| 38 | -1063 |
| 39 | 1219 |
| 40 | -1179 |
| 41 | 1343 |
| 42 | -1301 |
| 43 | 1473 |
| 44 | -1429 |
| 45 | 1609 |
| 46 | -1563 |
| 47 | 1751 |