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 | 9 |
| 2 | 171 |
| 3 | 1420 |
| 4 | 8262 |
| 5 | 33044 |
| 6 | 111155 |
| 7 | 312913 |
| 8 | 793049 |
| 9 | 1807754 |
| 10 | 3834490 |
| 11 | 7601982 |
| 12 | 14333819 |
| 13 | 25683401 |
| 14 | 44367189 |
| 15 | 73913316 |
| 16 | 119544010 |
| 17 | 187884853 |
| 18 | 288597817 |
| 19 | 433331391 |
| 20 | 638511294 |
| 21 | 923461382 |
| 22 | 1314459790 |
| 23 | 1842974369 |
| 24 | 2550288371 |