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 | 2 |
| 2 | 2 |
| 3 | 7 |
| 4 | 23 |
| 5 | 19 |
| 6 | 43 |
| 7 | 137 |
| 8 | 139 |
| 9 | 239 |
| 10 | 283 |
| 11 | 373 |
| 12 | 491 |
| 13 | 1019 |
| 14 | 929 |
| 15 | 2609 |
| 16 | 2699 |
| 17 | 1499 |
| 18 | 4451 |
| 19 | 3191 |
| 20 | 4441 |
| 21 | 5261 |
| 22 | 3251 |
| 23 | 6373 |
| 24 | 7853 |
| 25 | 8623 |
| 26 | 9013 |
| 27 | 6359 |
| 28 | 10289 |
| 29 | 9109 |
| 30 | 6833 |
| 31 | 7703 |
| 32 | 13417 |
| 33 | 19441 |
| 34 | 15329 |
| 35 | 19793 |
| 36 | 9311 |
| 37 | 16319 |
| 38 | 13109 |
| 39 | 12539 |
| 40 | 23899 |
| 41 | 26347 |
| 42 | 10111 |
| 43 | 11351 |
| 44 | 19687 |
| 45 | 27851 |
| 46 | 13627 |
| 47 | 34129 |
| 48 | 18521 |
| 49 | 27277 |
| 50 | 35537 |