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 | 2 |
| 3 | 4 |
| 4 | 6 |
| 5 | 8 |
| 6 | 212 |
| 7 | 232 |
| 8 | 252 |
| 9 | 272 |
| 10 | 292 |
| 11 | 414 |
| 12 | 434 |
| 13 | 454 |
| 14 | 474 |
| 15 | 494 |
| 16 | 616 |
| 17 | 636 |
| 18 | 656 |
| 19 | 676 |
| 20 | 696 |
| 21 | 818 |
| 22 | 838 |
| 23 | 858 |
| 24 | 878 |
| 25 | 898 |
| 26 | 21012 |
| 27 | 21212 |
| 28 | 21412 |
| 29 | 21612 |
| 30 | 21812 |
| 31 | 23032 |
| 32 | 23232 |
| 33 | 23432 |
| 34 | 23632 |
| 35 | 23832 |
| 36 | 25052 |
| 37 | 25252 |
| 38 | 25452 |
| 39 | 25652 |
| 40 | 25852 |
| 41 | 27072 |
| 42 | 27272 |
| 43 | 27472 |