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 | 135 |
| 2 | 3375 |
| 3 | 1485 |
| 4 | 2295 |
| 5 | 2565 |
| 6 | 3105 |
| 7 | 3915 |
| 8 | 4185 |
| 9 | 4995 |
| 10 | 5535 |
| 11 | 5805 |
| 12 | 6345 |
| 13 | 25137 |
| 14 | 7155 |
| 15 | 7965 |
| 16 | 8235 |
| 17 | 9045 |
| 18 | 9585 |
| 19 | 9855 |
| 20 | 10665 |
| 21 | 11205 |
| 22 | 12015 |
| 23 | 13095 |
| 24 | 13635 |
| 25 | 13905 |
| 26 | 14445 |
| 27 | 14715 |
| 28 | 43875 |
| 29 | 15255 |
| 30 | 16335 |
| 31 | 17145 |
| 32 | 17685 |
| 33 | 18495 |
| 34 | 18765 |
| 35 | 57375 |
| 36 | 20115 |
| 37 | 20385 |
| 38 | 21195 |
| 39 | 64125 |