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 | 16 |
| 2 | 9 |
| 3 | 14 |
| 4 | 48 |
| 5 | 90 |
| 6 | 199 |
| 7 | 689 |
| 8 | 2125 |
| 9 | 5410 |
| 10 | 13908 |
| 11 | 39850 |
| 12 | 114503 |
| 13 | 312683 |
| 14 | 845807 |
| 15 | 2344052 |
| 16 | 6547828 |
| 17 | 18092168 |
| 18 | 49718487 |
| 19 | 137265089 |
| 20 | 380242741 |
| 21 | 1051385042 |
| 22 | 2901539840 |
| 23 | 8012628856 |
| 24 | 22150069687 |
| 25 | 61220830095 |
| 26 | 169117170519 |
| 27 | 467176484780 |