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) |
|---|---|
| 1 | 3 |
| 2 | 6 |
| 3 | 22 |
| 4 | 68 |
| 5 | 217 |
| 6 | 683 |
| 7 | 2163 |
| 8 | 6837 |
| 9 | 21623 |
| 10 | 68377 |
| 11 | 216228 |
| 12 | 683772 |
| 13 | 2162278 |
| 14 | 6837722 |
| 15 | 21622777 |
| 16 | 68377223 |
| 17 | 216227767 |
| 18 | 683772233 |
| 19 | 2162277661 |
| 20 | 6837722339 |
| 21 | 21622776602 |
| 22 | 68377223398 |
| 23 | 216227766017 |
| 24 | 683772233983 |
| 25 | 2162277660169 |