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 | 34 |
| 3 | 278 |
| 4 | 1335 |
| 5 | 4461 |
| 6 | 12513 |
| 7 | 29321 |
| 8 | 63146 |
| 9 | 122439 |
| 10 | 225597 |
| 11 | 386649 |
| 12 | 644557 |
| 13 | 1015851 |
| 14 | 1570515 |
| 15 | 2333259 |
| 16 | 3415660 |
| 17 | 4835518 |
| 18 | 6792187 |
| 19 | 9268287 |
| 20 | 12572469 |
| 21 | 16673621 |
| 22 | 21988337 |
| 23 | 28424681 |
| 24 | 36677981 |
| 25 | 46446732 |
| 26 | 58699434 |
| 27 | 73107634 |
| 28 | 90873690 |
| 29 | 111384840 |
| 30 | 136555392 |