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 | 2 |
| 4 | 3 |
| 5 | 4 |
| 6 | 5 |
| 7 | 6 |
| 8 | 7 |
| 9 | 8 |
| 10 | 9 |
| 11 | 11 |
| 12 | 22 |
| 13 | 33 |
| 14 | 44 |
| 15 | 55 |
| 16 | 55155 |
| 17 | 55455 |
| 18 | 55755 |
| 19 | 57075 |
| 20 | 57375 |
| 21 | 113311 |
| 22 | 148841 |
| 23 | 2796972 |
| 24 | 8372738 |
| 25 | 11166111 |
| 26 | 14033041 |
| 27 | 26233262 |
| 28 | 28933982 |
| 29 | 150050051 |
| 30 | 151141151 |
| 31 | 152070251 |
| 32 | 152232251 |
| 33 | 153161351 |
| 34 | 153323351 |
| 35 | 154252451 |
| 36 | 154414451 |
| 37 | 155343551 |
| 38 | 155505551 |