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 | 6 |
| 2 | 27 |
| 3 | 98 |
| 4 | 315 |
| 5 | 913 |
| 6 | 2462 |
| 7 | 6237 |
| 8 | 15035 |
| 9 | 34705 |
| 10 | 77231 |
| 11 | 166364 |
| 12 | 348326 |
| 13 | 710869 |
| 14 | 1417900 |
| 15 | 2769730 |
| 16 | 5308732 |
| 17 | 9999185 |
| 18 | 18533944 |
| 19 | 33845975 |
| 20 | 60960273 |
| 21 | 108389248 |
| 22 | 190410133 |
| 23 | 330733733 |
| 24 | 568388100 |
| 25 | 967054374 |
| 26 | 1629808139 |
| 27 | 2722189979 |