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 | 28 |
| 2 | 784 |
| 3 | 1488 |
| 4 | 4846 |
| 5 | 14090 |
| 6 | 29982 |
| 7 | 65564 |
| 8 | 139730 |
| 9 | 299064 |
| 10 | 620638 |
| 11 | 1251316 |
| 12 | 2595908 |
| 13 | 5260942 |
| 14 | 10606968 |
| 15 | 21437670 |
| 16 | 42824016 |
| 17 | 86024822 |
| 18 | 171420110 |
| 19 | 340644210 |
| 20 | 678395210 |
| 21 | 1341990252 |
| 22 | 2658199478 |
| 23 | 5253155166 |
| 24 | 10354111212 |
| 25 | 20425614060 |