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 | 0 |
| 1 | 1 |
| 2 | 4 |
| 3 | 6 |
| 4 | 19 |
| 5 | 42 |
| 6 | 89 |
| 7 | 96 |
| 8 | 289 |
| 9 | 672 |
| 10 | 1441 |
| 11 | 2972 |
| 12 | 6039 |
| 13 | 12172 |
| 14 | 24441 |
| 15 | 48974 |
| 16 | 98043 |
| 17 | 196172 |
| 18 | 392419 |
| 19 | 784922 |
| 20 | 1569939 |
| 21 | 3139946 |
| 22 | 6279987 |
| 23 | 12560054 |
| 24 | 25120201 |