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 | 8 |
| 4 | 17 |
| 5 | 42 |
| 6 | 100 |
| 7 | 235 |
| 8 | 561 |
| 9 | 1331 |
| 10 | 3158 |
| 11 | 7503 |
| 12 | 17812 |
| 13 | 42292 |
| 14 | 100425 |
| 15 | 238445 |
| 16 | 566171 |
| 17 | 1344336 |
| 18 | 3192013 |
| 19 | 7579198 |
| 20 | 17996232 |
| 21 | 42730667 |
| 22 | 101460725 |
| 23 | 240910755 |
| 24 | 572024206 |
| 25 | 1358227891 |
| 26 | 3225008568 |
| 27 | 7657536968 |
| 28 | 18182237777 |
| 29 | 43172337417 |