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 | 0 |
| 2 | 0 |
| 3 | 7 |
| 4 | 35 |
| 5 | 104 |
| 6 | 252 |
| 7 | 509 |
| 8 | 997 |
| 9 | 1688 |
| 10 | 2751 |
| 11 | 4175 |
| 12 | 6240 |
| 13 | 8872 |
| 14 | 12324 |
| 15 | 16639 |
| 16 | 22196 |
| 17 | 28668 |
| 18 | 36931 |
| 19 | 46332 |
| 20 | 58184 |
| 21 | 71524 |
| 22 | 87183 |
| 23 | 105334 |
| 24 | 126524 |
| 25 | 150233 |
| 26 | 177448 |
| 27 | 207751 |
| 28 | 242948 |
| 29 | 281139 |
| 30 | 324739 |