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 | 0 |
| 2 | 1 |
| 3 | 20 |
| 4 | 21 |
| 5 | 84 |
| 6 | 104 |
| 7 | 105 |
| 8 | 220 |
| 9 | 304 |
| 10 | 324 |
| 11 | 325 |
| 12 | 455 |
| 13 | 675 |
| 14 | 759 |
| 15 | 779 |
| 16 | 780 |
| 17 | 816 |
| 18 | 1271 |
| 19 | 1330 |
| 20 | 1491 |
| 21 | 1575 |
| 22 | 1595 |
| 23 | 1596 |
| 24 | 2024 |
| 25 | 2146 |
| 26 | 2601 |
| 27 | 2821 |
| 28 | 2905 |
| 29 | 2925 |
| 30 | 2926 |
| 31 | 3354 |
| 32 | 4060 |
| 33 | 4170 |
| 34 | 4625 |
| 35 | 4845 |
| 36 | 4929 |
| 37 | 4949 |
| 38 | 4950 |
| 39 | 5456 |
| 40 | 6279 |
| 41 | 6985 |
| 42 | 7095 |
| 43 | 7140 |
| 44 | 7550 |
| 45 | 7770 |
| 46 | 7854 |
| 47 | 7874 |
| 48 | 7875 |
| 49 | 9009 |
| 50 | 9139 |
| 51 | 9516 |