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 | 1 |
| 1 | 13 |
| 2 | 71 |
| 3 | 259 |
| 4 | 742 |
| 5 | 1806 |
| 6 | 3906 |
| 7 | 7722 |
| 8 | 14223 |
| 9 | 24739 |
| 10 | 41041 |
| 11 | 65429 |
| 12 | 100828 |
| 13 | 150892 |
| 14 | 220116 |
| 15 | 313956 |
| 16 | 438957 |
| 17 | 602889 |
| 18 | 814891 |
| 19 | 1085623 |
| 20 | 1427426 |
| 21 | 1854490 |
| 22 | 2383030 |
| 23 | 3031470 |
| 24 | 3820635 |
| 25 | 4773951 |
| 26 | 5917653 |