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 | 1 |
| 2 | 9 |
| 3 | 17 |
| 4 | 89 |
| 5 | 225 |
| 6 | 937 |
| 7 | 2737 |
| 8 | 10233 |
| 9 | 32129 |
| 10 | 113993 |
| 11 | 371025 |
| 12 | 1282969 |
| 13 | 4251169 |
| 14 | 14514921 |
| 15 | 48524273 |
| 16 | 164643641 |
| 17 | 552837825 |
| 18 | 1869986953 |
| 19 | 6292689553 |
| 20 | 21252585177 |
| 21 | 71594101601 |
| 22 | 241614783017 |
| 23 | 814367595825 |
| 24 | 2747285859961 |