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 | 97 |
| 3 | 2177 |
| 4 | 23058 |
| 5 | 152979 |
| 6 | 738835 |
| 7 | 2839571 |
| 8 | 9191876 |
| 9 | 26037717 |
| 10 | 66301333 |
| 11 | 154762069 |
| 12 | 336050870 |
| 13 | 686502375 |
| 14 | 1331121351 |
| 15 | 2467171687 |
| 16 | 4396168328 |
| 17 | 7566347369 |
| 18 | 12628007049 |
| 19 | 20504452585 |
| 20 | 32481640666 |
| 21 | 50320004987 |
| 22 | 76392352443 |
| 23 | 113852150523 |
| 24 | 166836980044 |
| 25 | 240712403645 |