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 | 3 |
| 3 | 5 |
| 4 | 13 |
| 5 | 24 |
| 6 | 59 |
| 7 | 115 |
| 8 | 273 |
| 9 | 552 |
| 10 | 1278 |
| 11 | 2655 |
| 12 | 6031 |
| 13 | 12795 |
| 14 | 28632 |
| 15 | 61775 |
| 16 | 136572 |
| 17 | 298764 |
| 18 | 653948 |
| 19 | 1447225 |
| 20 | 3141427 |
| 21 | 7020833 |
| 22 | 15132512 |
| 23 | 34106865 |
| 24 | 73069892 |
| 25 | 165903082 |
| 26 | 353576829 |
| 27 | 807957495 |
| 28 | 1714132308 |
| 29 | 3939206346 |