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 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 48 |
| 6 | 50 |
| 7 | 60 |
| 8 | 504 |
| 9 | 540 |
| 10 | 546 |
| 11 | 558 |
| 12 | 561 |
| 13 | 564 |
| 14 | 567 |
| 15 | 4204 |
| 16 | 4212 |
| 17 | 4220 |
| 18 | 4228 |
| 19 | 4232 |
| 20 | 4236 |
| 21 | 32270 |
| 22 | 32290 |
| 23 | 32305 |
| 24 | 32310 |
| 25 | 32325 |
| 26 | 32345 |
| 27 | 32350 |
| 28 | 32355 |
| 29 | 32360 |
| 30 | 240426 |
| 31 | 240432 |
| 32 | 240504 |
| 33 | 240510 |
| 34 | 240516 |
| 35 | 240522 |
| 36 | 240528 |
| 37 | 240534 |
| 38 | 240540 |
| 39 | 240546 |
| 40 | 240648 |
| 41 | 240678 |
| 42 | 240684 |