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 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 7 |
| 5 | 12 |
| 6 | 23 |
| 7 | 41 |
| 8 | 72 |
| 9 | 135 |
| 10 | 243 |
| 11 | 432 |
| 12 | 804 |
| 13 | 1455 |
| 14 | 2608 |
| 15 | 4836 |
| 16 | 8785 |
| 17 | 15838 |
| 18 | 29306 |
| 19 | 53385 |
| 20 | 96654 |
| 21 | 178600 |
| 22 | 326019 |
| 23 | 592140 |
| 24 | 1093135 |
| 25 | 1998537 |
| 26 | 3638700 |
| 27 | 6712659 |
| 28 | 12287071 |
| 29 | 22412784 |
| 30 | 41325279 |
| 31 | 75712253 |
| 32 | 138308808 |
| 33 | 254912873 |