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 | 9 |
| 3 | 33 |
| 4 | 41 |
| 5 | 129 |
| 6 | 137 |
| 7 | 161 |
| 8 | 169 |
| 9 | 513 |
| 10 | 521 |
| 11 | 545 |
| 12 | 553 |
| 13 | 641 |
| 14 | 649 |
| 15 | 673 |
| 16 | 681 |
| 17 | 2049 |
| 18 | 2057 |
| 19 | 2081 |
| 20 | 2089 |
| 21 | 2177 |
| 22 | 2185 |
| 23 | 2209 |
| 24 | 2217 |
| 25 | 2561 |
| 26 | 2569 |
| 27 | 2593 |
| 28 | 2601 |
| 29 | 2689 |
| 30 | 2697 |
| 31 | 2721 |
| 32 | 2729 |
| 33 | 8193 |
| 34 | 8201 |
| 35 | 8225 |
| 36 | 8233 |
| 37 | 8321 |
| 38 | 8329 |
| 39 | 8353 |
| 40 | 8361 |
| 41 | 8705 |
| 42 | 8713 |
| 43 | 8737 |
| 44 | 8745 |
| 45 | 8833 |
| 46 | 8841 |
| 47 | 8865 |
| 48 | 8873 |
| 49 | 10241 |