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 | 26 |
| 2 | 87 |
| 3 | 233 |
| 4 | 577 |
| 5 | 1377 |
| 6 | 3217 |
| 7 | 7409 |
| 8 | 16881 |
| 9 | 38129 |
| 10 | 85489 |
| 11 | 190449 |
| 12 | 421873 |
| 13 | 929777 |
| 14 | 2039793 |
| 15 | 4456433 |
| 16 | 9699313 |
| 17 | 21037041 |
| 18 | 45481969 |
| 19 | 98041841 |
| 20 | 210763761 |
| 21 | 451936241 |
| 22 | 966787057 |
| 23 | 2063597553 |
| 24 | 4395630577 |
| 25 | 9344909297 |
| 26 | 19830669297 |
| 27 | 42010148849 |
| 28 | 88852135921 |