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 | 3 |
| 2 | 15 |
| 3 | 30 |
| 4 | 42 |
| 5 | 135 |
| 6 | 231 |
| 7 | 297 |
| 8 | 627 |
| 9 | 792 |
| 10 | 1002 |
| 11 | 1575 |
| 12 | 2436 |
| 13 | 5604 |
| 14 | 8349 |
| 15 | 10143 |
| 16 | 14883 |
| 17 | 31185 |
| 18 | 37338 |
| 19 | 44583 |
| 20 | 63261 |
| 21 | 105558 |
| 22 | 147273 |
| 23 | 239943 |
| 24 | 281589 |
| 25 | 329931 |
| 26 | 614154 |
| 27 | 1121505 |
| 28 | 1505499 |
| 29 | 3087735 |
| 30 | 4087968 |
| 31 | 4697205 |
| 32 | 8118264 |
| 33 | 15796476 |
| 34 | 44108109 |