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 | 13 |
| 3 | 60 |
| 4 | 348 |
| 5 | 1916 |
| 6 | 10668 |
| 7 | 59257 |
| 8 | 329350 |
| 9 | 1830234 |
| 10 | 10171315 |
| 11 | 56525022 |
| 12 | 314128014 |
| 13 | 1745708992 |
| 14 | 9701463927 |
| 15 | 53914132251 |
| 16 | 299618062228 |
| 17 | 1665073290365 |
| 18 | 9253344266757 |
| 19 | 51423790446062 |
| 20 | 285778433090830 |
| 21 | 1588162056821687 |
| 22 | 8825923956549044 |
| 23 | 49048479247236561 |