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 | 122 |
| 2 | 387 |
| 3 | 965 |
| 4 | 2221 |
| 5 | 4941 |
| 6 | 10813 |
| 7 | 23453 |
| 8 | 50589 |
| 9 | 108701 |
| 10 | 232861 |
| 11 | 497565 |
| 12 | 1060765 |
| 13 | 2256797 |
| 14 | 4792221 |
| 15 | 10157981 |
| 16 | 21495709 |
| 17 | 45416349 |
| 18 | 95813533 |
| 19 | 201850781 |
| 20 | 424673181 |
| 21 | 892338077 |
| 22 | 1872756637 |
| 23 | 3925868445 |
| 24 | 8220835741 |
| 25 | 17196646301 |