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 | 222 |
| 2 | 255 |
| 3 | 273 |
| 4 | 322 |
| 5 | 357 |
| 6 | 555 |
| 7 | 777 |
| 8 | 2222 |
| 9 | 2233 |
| 10 | 2235 |
| 11 | 2255 |
| 12 | 2337 |
| 13 | 2355 |
| 14 | 2373 |
| 15 | 2522 |
| 16 | 2553 |
| 17 | 2555 |
| 18 | 2737 |
| 19 | 2755 |
| 20 | 3237 |
| 21 | 3322 |
| 22 | 3333 |
| 23 | 3335 |
| 24 | 3355 |
| 25 | 3522 |
| 26 | 3535 |
| 27 | 3553 |
| 28 | 3723 |
| 29 | 5222 |
| 30 | 5235 |
| 31 | 5253 |
| 32 | 5322 |
| 33 | 5335 |
| 34 | 5522 |
| 35 | 5523 |
| 36 | 5555 |
| 37 | 5727 |
| 38 | 5735 |
| 39 | 5757 |
| 40 | 7222 |
| 41 | 7257 |
| 42 | 7322 |
| 43 | 7337 |
| 44 | 7527 |
| 45 | 7535 |
| 46 | 7553 |
| 47 | 7557 |