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 | 43 |
| 3 | 0 |
| 4 | 47 |
| 5 | 44444444444444411 |
| 6 | 44444444413 |
| 7 | 44417 |
| 8 | 419 |
| 9 | 4423 |
| 10 | 4444444429 |
| 11 | 431 |
| 12 | 444444437 |
| 13 | 4441 |
| 14 | 443 |
| 15 | 4447 |
| 16 | 44453 |
| 17 | 44444459 |
| 18 | 461 |
| 19 | 467 |
| 20 | 4444471 |
| 21 | 444473 |
| 22 | 479 |
| 23 | 4483 |
| 24 | 44444489 |
| 25 | 44497 |
| 26 | 44101 |
| 27 | 444444103 |
| 28 | 444444444444107 |
| 29 | 444109 |
| 30 | 444113 |
| 31 | 4127 |