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 | 1 |
| 3 | 3 |
| 4 | 16 |
| 5 | 19 |
| 6 | 35 |
| 7 | 89 |
| 8 | 124 |
| 9 | 213 |
| 10 | 763 |
| 11 | 7843 |
| 12 | 16449 |
| 13 | 24292 |
| 14 | 89325 |
| 15 | 202942 |
| 16 | 4959933 |
| 17 | 5162875 |
| 18 | 20448558 |
| 19 | 46059991 |
| 20 | 158628531 |
| 21 | 204688522 |
| 22 | 363317053 |
| 23 | 568005575 |
| 24 | 51483818803 |
| 25 | 103535643181 |
| 26 | 155019461984 |
| 27 | 1963769186989 |
| 28 | 2118788648973 |