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 | 7 |
| 2 | 23 |
| 3 | 67 |
| 4 | 179 |
| 5 | 453 |
| 6 | 1109 |
| 7 | 2653 |
| 8 | 6231 |
| 9 | 14409 |
| 10 | 32877 |
| 11 | 74137 |
| 12 | 165429 |
| 13 | 365691 |
| 14 | 801747 |
| 15 | 1745331 |
| 16 | 3776605 |
| 17 | 8130401 |
| 18 | 17427659 |
| 19 | 37217597 |
| 20 | 79224121 |
| 21 | 168170537 |
| 22 | 356107787 |
| 23 | 752453861 |
| 24 | 1586875049 |
| 25 | 3340696135 |
| 26 | 7021048691 |
| 27 | 14731810645 |