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 | 2 |
| 2 | 3 |
| 3 | 7 |
| 4 | 13 |
| 5 | 43 |
| 6 | 139 |
| 7 | 313 |
| 8 | 661 |
| 9 | 1321 |
| 10 | 2659 |
| 11 | 5419 |
| 12 | 10891 |
| 13 | 22039 |
| 14 | 44383 |
| 15 | 88801 |
| 16 | 177841 |
| 17 | 355723 |
| 18 | 713833 |
| 19 | 1427749 |
| 20 | 2860771 |
| 21 | 5725453 |
| 22 | 11461141 |
| 23 | 22933441 |
| 24 | 45895573 |
| 25 | 91793059 |
| 26 | 183616423 |
| 27 | 367232911 |
| 28 | 734482123 |
| 29 | 1468965061 |
| 30 | 2937930211 |
| 31 | 5875882249 |
| 32 | 11751795061 |
| 33 | 23503590559 |
| 34 | 47007181621 |
| 35 | 94014363763 |