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 | 4 |
| 2 | 5 |
| 3 | 20 |
| 4 | 21 |
| 5 | 68 |
| 6 | 69 |
| 7 | 84 |
| 8 | 85 |
| 9 | 4100 |
| 10 | 4101 |
| 11 | 4116 |
| 12 | 4117 |
| 13 | 4164 |
| 14 | 4165 |
| 15 | 4180 |
| 16 | 4181 |
| 17 | 16388 |
| 18 | 16389 |
| 19 | 16404 |
| 20 | 16405 |
| 21 | 16452 |
| 22 | 16453 |
| 23 | 16468 |
| 24 | 16469 |
| 25 | 20484 |
| 26 | 20485 |
| 27 | 20500 |
| 28 | 20501 |
| 29 | 20548 |
| 30 | 20549 |
| 31 | 20564 |
| 32 | 20565 |
| 33 | 65540 |
| 34 | 65541 |
| 35 | 65556 |
| 36 | 65557 |
| 37 | 65604 |
| 38 | 65605 |
| 39 | 65620 |