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 | 3 |
| 3 | 8 |
| 4 | 17 |
| 5 | 31 |
| 6 | 64 |
| 7 | 122 |
| 8 | 136 |
| 9 | 199 |
| 10 | 270 |
| 11 | 411 |
| 12 | 817 |
| 13 | 1234 |
| 14 | 1649 |
| 15 | 2484 |
| 16 | 3321 |
| 17 | 4981 |
| 18 | 7480 |
| 19 | 9993 |