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 | 1 |
| 2 | 2 |
| 3 | 11 |
| 4 | 24 |
| 5 | 38 |
| 6 | 105 |
| 7 | 381 |
| 8 | 1067 |
| 9 | 2676 |
| 10 | 7533 |
| 11 | 22732 |
| 12 | 65556 |
| 13 | 183281 |
| 14 | 521969 |
| 15 | 1510877 |
| 16 | 4344326 |
| 17 | 12399075 |
| 18 | 35475604 |
| 19 | 101864678 |
| 20 | 292266497 |
| 21 | 837202865 |
| 22 | 2398735503 |
| 23 | 6877922768 |
| 24 | 19720368509 |
| 25 | 56523514608 |
| 26 | 162009389860 |
| 27 | 464424317089 |