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 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 1 |
| 8 | 9 |
| 9 | 46 |
| 10 | 176 |
| 11 | 562 |
| 12 | 1586 |
| 13 | 4096 |
| 14 | 9908 |
| 15 | 22819 |
| 16 | 50643 |
| 17 | 109294 |
| 18 | 230964 |
| 19 | 480492 |
| 20 | 988116 |
| 21 | 2014992 |
| 22 | 4084248 |
| 23 | 8243109 |
| 24 | 16587165 |
| 25 | 33308926 |
| 26 | 66794952 |
| 27 | 133820134 |
| 28 | 267936278 |
| 29 | 536249296 |
| 30 | 1072973612 |
| 31 | 2146540999 |