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 | 4 |
| 2 | 6 |
| 3 | 12 |
| 4 | 30 |
| 5 | 124 |
| 6 | 418 |
| 7 | 1274 |
| 8 | 2512 |
| 9 | 3526 |
| 10 | 4618 |
| 11 | 7432 |
| 12 | 12778 |
| 13 | 26098 |
| 14 | 34192 |
| 15 | 37768 |
| 16 | 59914 |
| 17 | 88786 |
| 18 | 97768 |
| 19 | 112558 |
| 20 | 221942 |
| 21 | 237544 |
| 22 | 485326 |
| 23 | 642358 |
| 24 | 686638 |
| 25 | 1042078 |
| 26 | 1172918 |
| 27 | 2041402 |
| 28 | 2406448 |
| 29 | 4288574 |
| 30 | 4938848 |
| 31 | 9292156 |
| 32 | 14341888 |
| 33 | 17726098 |
| 34 | 20757292 |
| 35 | 32507242 |