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) |
|---|---|
| 1 | 24 |
| 2 | 123 |
| 3 | 876 |
| 4 | 4153 |
| 5 | 13270 |
| 6 | 30359 |
| 7 | 54842 |
| 8 | 118709 |
| 9 | 249138 |
| 10 | 451435 |
| 11 | 578416 |
| 12 | 1097315 |
| 13 | 1689194 |
| 14 | 2764601 |
| 15 | 4168526 |
| 16 | 4963149 |
| 17 | 7736592 |
| 18 | 10637277 |
| 19 | 15795400 |
| 20 | 20870151 |
| 21 | 23943826 |
| 22 | 33943725 |
| 23 | 42406142 |
| 24 | 59306385 |
| 25 | 76126258 |
| 26 | 89257109 |
| 27 | 110426270 |