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 | 9 |
| 2 | 30 |
| 3 | 105 |
| 4 | 21 |
| 5 | 495 |
| 6 | 858 |
| 7 | 65 |
| 8 | 2040 |
| 9 | 2907 |
| 10 | 133 |
| 11 | 5313 |
| 12 | 6900 |
| 13 | 225 |
| 14 | 10962 |
| 15 | 13485 |
| 16 | 341 |
| 17 | 19635 |
| 18 | 23310 |
| 19 | 481 |
| 20 | 31980 |
| 21 | 37023 |
| 22 | 645 |
| 23 | 48645 |
| 24 | 55272 |
| 25 | 833 |
| 26 | 70278 |
| 27 | 78705 |
| 28 | 1045 |
| 29 | 97527 |
| 30 | 107970 |
| 31 | 1281 |
| 32 | 131040 |
| 33 | 143715 |
| 34 | 1541 |
| 35 | 171465 |
| 36 | 186588 |
| 37 | 1825 |
| 38 | 219450 |
| 39 | 237237 |
| 40 | 2133 |
| 41 | 275643 |
| 42 | 296310 |
| 43 | 2465 |