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) |
|---|---|
| 0 | 3 |
| 1 | 69 |
| 2 | 345 |
| 3 | 1203 |
| 4 | 3351 |
| 5 | 7953 |
| 6 | 16749 |
| 7 | 32175 |
| 8 | 57483 |
| 9 | 96861 |
| 10 | 155553 |
| 11 | 239979 |
| 12 | 357855 |
| 13 | 518313 |
| 14 | 732021 |
| 15 | 1011303 |
| 16 | 1370259 |
| 17 | 1824885 |
| 18 | 2393193 |
| 19 | 3095331 |
| 20 | 3953703 |
| 21 | 4993089 |
| 22 | 6240765 |
| 23 | 7726623 |
| 24 | 9483291 |
| 25 | 11546253 |
| 26 | 13953969 |
| 27 | 16747995 |
| 28 | 19973103 |
| 29 | 23677401 |
| 30 | 27912453 |