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 | 1 |
| 2 | 2 |
| 3 | 7 |
| 4 | 14 |
| 5 | 30 |
| 6 | 76 |
| 7 | 188 |
| 8 | 444 |
| 9 | 1075 |
| 10 | 2656 |
| 11 | 6499 |
| 12 | 15904 |
| 13 | 39257 |
| 14 | 97012 |
| 15 | 239836 |
| 16 | 594484 |
| 17 | 1476309 |
| 18 | 3670470 |
| 19 | 9137025 |
| 20 | 22774518 |
| 21 | 56827616 |
| 22 | 141930316 |
| 23 | 354803429 |
| 24 | 887699408 |
| 25 | 2222657891 |
| 26 | 5569118954 |
| 27 | 13963300515 |
| 28 | 35031289966 |
| 29 | 87937202200 |
| 30 | 220862633536 |