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 | 255255 |
| 2 | 285285 |
| 3 | 345345 |
| 4 | 373065 |
| 5 | 435435 |
| 6 | 440895 |
| 7 | 451605 |
| 8 | 465465 |
| 9 | 504735 |
| 10 | 533715 |
| 11 | 555555 |
| 12 | 569415 |
| 13 | 596505 |
| 14 | 608685 |
| 15 | 615615 |
| 16 | 636405 |
| 17 | 645645 |
| 18 | 672945 |
| 19 | 680295 |
| 20 | 692835 |
| 21 | 705705 |
| 22 | 719355 |
| 23 | 726495 |
| 24 | 752115 |
| 25 | 770385 |
| 26 | 780045 |
| 27 | 795795 |
| 28 | 803985 |
| 29 | 805035 |
| 30 | 811965 |
| 31 | 823515 |
| 32 | 838695 |
| 33 | 844305 |
| 34 | 858585 |