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 | 132 |
| 1 | 812 |
| 2 | 2172 |
| 3 | 4892 |
| 4 | 10332 |
| 5 | 21212 |
| 6 | 42972 |
| 7 | 86492 |
| 8 | 173532 |
| 9 | 347612 |
| 10 | 695772 |
| 11 | 1392092 |
| 12 | 2784732 |
| 13 | 5570012 |
| 14 | 11140572 |
| 15 | 22281692 |
| 16 | 44563932 |
| 17 | 89128412 |
| 18 | 178257372 |
| 19 | 356515292 |
| 20 | 713031132 |
| 21 | 1426062812 |
| 22 | 2852126172 |
| 23 | 5704252892 |
| 24 | 11408506332 |
| 25 | 22817013212 |
| 26 | 45634026972 |
| 27 | 91268054492 |
| 28 | 182536109532 |
| 29 | 365072219612 |