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 | 7 |
| 2 | 79 |
| 3 | 478 |
| 4 | 2108 |
| 5 | 7364 |
| 6 | 21652 |
| 7 | 55532 |
| 8 | 127604 |
| 9 | 268108 |
| 10 | 523244 |
| 11 | 960212 |
| 12 | 1672972 |
| 13 | 2788724 |
| 14 | 4475108 |
| 15 | 6948124 |
| 16 | 10480772 |
| 17 | 15412412 |
| 18 | 22158844 |
| 19 | 31223108 |
| 20 | 43207004 |
| 21 | 58823332 |
| 22 | 78908852 |
| 23 | 104437964 |
| 24 | 136537108 |
| 25 | 176499884 |
| 26 | 225802892 |
| 27 | 286122292 |