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 | 0 |
| 2 | 1 |
| 3 | 6 |
| 4 | 19 |
| 5 | 47 |
| 6 | 103 |
| 7 | 203 |
| 8 | 373 |
| 9 | 649 |
| 10 | 1079 |
| 11 | 1727 |
| 12 | 2681 |
| 13 | 4048 |
| 14 | 5969 |
| 15 | 8620 |
| 16 | 12218 |
| 17 | 17028 |
| 18 | 23378 |
| 19 | 31654 |
| 20 | 42324 |
| 21 | 55941 |
| 22 | 73155 |
| 23 | 94725 |