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 | 9 |
| 2 | 33 |
| 3 | 91 |
| 4 | 99 |
| 5 | 259 |
| 6 | 451 |
| 7 | 481 |
| 8 | 561 |
| 9 | 657 |
| 10 | 703 |
| 11 | 909 |
| 12 | 1233 |
| 13 | 1729 |
| 14 | 2409 |
| 15 | 2821 |
| 16 | 2981 |
| 17 | 3333 |
| 18 | 3367 |
| 19 | 4141 |
| 20 | 4187 |
| 21 | 4521 |
| 22 | 5461 |
| 23 | 6533 |
| 24 | 6541 |
| 25 | 6601 |
| 26 | 7107 |
| 27 | 7471 |
| 28 | 7777 |
| 29 | 8149 |
| 30 | 8401 |
| 31 | 8911 |
| 32 | 10001 |
| 33 | 11111 |
| 34 | 11169 |
| 35 | 11649 |
| 36 | 12403 |
| 37 | 12801 |
| 38 | 13833 |
| 39 | 13981 |
| 40 | 14701 |
| 41 | 14817 |
| 42 | 14911 |
| 43 | 15211 |