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 | 105105 |
| 2 | 135135 |
| 3 | 153153 |
| 4 | 165165 |
| 5 | 171171 |
| 6 | 189189 |
| 7 | 195195 |
| 8 | 207207 |
| 9 | 225225 |
| 10 | 243243 |
| 11 | 255255 |
| 12 | 261261 |
| 13 | 279279 |
| 14 | 285285 |
| 15 | 297297 |
| 16 | 315315 |
| 17 | 345345 |
| 18 | 351351 |
| 19 | 375375 |
| 20 | 405405 |
| 21 | 435435 |
| 22 | 459459 |
| 23 | 465465 |
| 24 | 495495 |
| 25 | 513513 |
| 26 | 525525 |
| 27 | 555555 |
| 28 | 567567 |
| 29 | 585585 |
| 30 | 615615 |
| 31 | 621621 |
| 32 | 645645 |
| 33 | 675675 |
| 34 | 705705 |
| 35 | 729729 |
| 36 | 735735 |
| 37 | 765765 |
| 38 | 783783 |
| 39 | 795795 |
| 40 | 825825 |
| 41 | 837837 |