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 | 4 |
| 3 | 6 |
| 4 | 8 |
| 5 | 16 |
| 6 | 26 |
| 7 | 36 |
| 8 | 72 |
| 9 | 106 |
| 10 | 114 |
| 11 | 138 |
| 12 | 412 |
| 13 | 546 |
| 14 | 800 |
| 15 | 1966 |
| 16 | 2616 |
| 17 | 5162 |
| 18 | 6410 |
| 19 | 8236 |
| 20 | 27062 |
| 21 | 29784 |
| 22 | 177104 |
| 23 | 278256 |
| 24 | 342486 |
| 25 | 556126 |
| 26 | 664364 |
| 27 | 1388708 |
| 28 | 6833546 |
| 29 | 8622762 |
| 30 | 9734048 |