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 | 300 |
| 2 | 2100 |
| 3 | 3300 |
| 4 | 3900 |
| 5 | 5100 |
| 6 | 5700 |
| 7 | 6900 |
| 8 | 8700 |
| 9 | 9300 |
| 10 | 11100 |
| 11 | 12100 |
| 12 | 12300 |
| 13 | 12900 |
| 14 | 14100 |
| 15 | 15900 |
| 16 | 17700 |
| 17 | 18300 |
| 18 | 20100 |
| 19 | 21300 |
| 20 | 21900 |
| 21 | 23100 |
| 22 | 23700 |
| 23 | 23760 |
| 24 | 24900 |
| 25 | 26700 |
| 26 | 27300 |
| 27 | 29100 |
| 28 | 30300 |
| 29 | 30900 |
| 30 | 32100 |
| 31 | 32700 |
| 32 | 33900 |
| 33 | 35700 |
| 34 | 38100 |
| 35 | 39300 |
| 36 | 39900 |
| 37 | 41100 |
| 38 | 41700 |
| 39 | 42900 |