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 | 153 |
| 2 | 6297 |
| 3 | 82161 |
| 4 | 582377 |
| 5 | 2823169 |
| 6 | 10577681 |
| 7 | 32908425 |
| 8 | 88984025 |
| 9 | 215645185 |
| 10 | 478631121 |
| 11 | 988480025 |
| 12 | 1922282689 |
| 13 | 3552547017 |
| 14 | 6284626217 |
| 15 | 10704205425 |
| 16 | 17636581137 |
| 17 | 28219457161 |
| 18 | 43991281193 |
| 19 | 66997065953 |
| 20 | 99914018553 |
| 21 | 146199131313 |
| 22 | 210261368801 |
| 23 | 297660801977 |