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 | 109 |
| 2 | 409 |
| 3 | 509 |
| 4 | 709 |
| 5 | 809 |
| 6 | 1009 |
| 7 | 1109 |
| 8 | 1409 |
| 9 | 1609 |
| 10 | 1709 |
| 11 | 2309 |
| 12 | 2609 |
| 13 | 2909 |
| 14 | 3109 |
| 15 | 3209 |
| 16 | 3709 |
| 17 | 4409 |
| 18 | 4909 |
| 19 | 5009 |
| 20 | 5209 |
| 21 | 5309 |
| 22 | 6709 |
| 23 | 7109 |
| 24 | 7309 |
| 25 | 8009 |
| 26 | 8209 |
| 27 | 8609 |
| 28 | 9109 |
| 29 | 9209 |
| 30 | 10009 |
| 31 | 10709 |
| 32 | 10909 |
| 33 | 11909 |
| 34 | 12109 |
| 35 | 12409 |
| 36 | 12809 |
| 37 | 13009 |
| 38 | 13109 |
| 39 | 13309 |
| 40 | 13709 |