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 | 9 |
| 4 | 15 |
| 5 | 45 |
| 6 | 135 |
| 7 | 189 |
| 8 | 315 |
| 9 | 495 |
| 10 | 765 |
| 11 | 2079 |
| 12 | 3465 |
| 13 | 4095 |
| 14 | 8415 |
| 15 | 12285 |
| 16 | 45045 |
| 17 | 69615 |
| 18 | 135135 |
| 19 | 405405 |
| 20 | 528255 |
| 21 | 675675 |
| 22 | 765765 |
| 23 | 2297295 |
| 24 | 5810805 |
| 25 | 11486475 |
| 26 | 17432415 |
| 27 | 29054025 |
| 28 | 32927895 |
| 29 | 43648605 |
| 30 | 50331645 |
| 31 | 98783685 |
| 32 | 184549365 |
| 33 | 296351055 |
| 34 | 392837445 |
| 35 | 553648095 |