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 | 1 |
| 3 | 3 |
| 4 | 9 |
| 5 | 9 |
| 6 | 19 |
| 7 | 45 |
| 8 | 145 |
| 9 | 260 |
| 10 | 604 |
| 11 | 1354 |
| 12 | 3182 |
| 13 | 6298 |
| 14 | 13020 |
| 15 | 25642 |
| 16 | 50388 |
| 17 | 92820 |
| 18 | 170578 |
| 19 | 303424 |
| 20 | 533798 |
| 21 | 908606 |
| 22 | 1530476 |
| 23 | 2522074 |
| 24 | 4107717 |
| 25 | 6553695 |
| 26 | 10343897 |
| 27 | 16070605 |
| 28 | 24706363 |
| 29 | 37437245 |
| 30 | 56184469 |
| 31 | 83316627 |
| 32 | 122439255 |
| 33 | 177978716 |
| 34 | 256574818 |
| 35 | 366404272 |