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 | 3 |
| 3 | 5 |
| 4 | 9 |
| 5 | 15 |
| 6 | 21 |
| 7 | 35 |
| 8 | 39 |
| 9 | 45 |
| 10 | 99 |
| 11 | 135 |
| 12 | 231 |
| 13 | 255 |
| 14 | 855 |
| 15 | 1035 |
| 16 | 1295 |
| 17 | 1539 |
| 18 | 1599 |
| 19 | 2015 |
| 20 | 4335 |
| 21 | 6525 |
| 22 | 9177 |
| 23 | 14399 |
| 24 | 16095 |
| 25 | 30495 |
| 26 | 55385 |
| 27 | 61131 |
| 28 | 62799 |
| 29 | 65535 |
| 30 | 72579 |
| 31 | 77615 |
| 32 | 110175 |
| 33 | 152649 |
| 34 | 179295 |
| 35 | 244965 |
| 36 | 299649 |
| 37 | 603459 |
| 38 | 619695 |
| 39 | 686735 |
| 40 | 1876725 |
| 41 | 2841915 |
| 42 | 3058209 |