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 | 127 |
| 4 | 467 |
| 5 | 1302 |
| 6 | 3038 |
| 7 | 6258 |
| 8 | 11754 |
| 9 | 20559 |
| 10 | 33979 |
| 11 | 53625 |
| 12 | 81445 |
| 13 | 119756 |
| 14 | 171276 |
| 15 | 239156 |
| 16 | 327012 |
| 17 | 438957 |
| 18 | 579633 |
| 19 | 754243 |
| 20 | 968583 |
| 21 | 1229074 |
| 22 | 1542794 |
| 23 | 1917510 |
| 24 | 2361710 |
| 25 | 2884635 |
| 26 | 3496311 |
| 27 | 4207581 |
| 28 | 5030137 |
| 29 | 5976552 |
| 30 | 7060312 |