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 | 15 |
| 2 | 84 |
| 3 | 308 |
| 4 | 882 |
| 5 | 2142 |
| 6 | 4620 |
| 7 | 9108 |
| 8 | 16731 |
| 9 | 29029 |
| 10 | 48048 |
| 11 | 76440 |
| 12 | 117572 |
| 13 | 175644 |
| 14 | 255816 |
| 15 | 364344 |
| 16 | 508725 |
| 17 | 697851 |
| 18 | 942172 |
| 19 | 1253868 |
| 20 | 1647030 |
| 21 | 2137850 |
| 22 | 2744820 |
| 23 | 3488940 |
| 24 | 4393935 |
| 25 | 5486481 |
| 26 | 6796440 |
| 27 | 8357104 |