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 | 21 |
| 3 | 121 |
| 4 | 432 |
| 5 | 1182 |
| 6 | 2723 |
| 7 | 5558 |
| 8 | 10368 |
| 9 | 18039 |
| 10 | 29689 |
| 11 | 46695 |
| 12 | 70720 |
| 13 | 103740 |
| 14 | 148071 |
| 15 | 206396 |
| 16 | 281792 |
| 17 | 377757 |
| 18 | 498237 |
| 19 | 647653 |
| 20 | 830928 |
| 21 | 1053514 |
| 22 | 1321419 |
| 23 | 1641234 |
| 24 | 2020160 |
| 25 | 2466035 |
| 26 | 2987361 |
| 27 | 3593331 |
| 28 | 4293856 |
| 29 | 5099592 |
| 30 | 6021967 |
| 31 | 7073208 |
| 32 | 8266368 |
| 33 | 9615353 |
| 34 | 11134949 |
| 35 | 12840849 |