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 | 28 |
| 2 | 476 |
| 3 | 1106 |
| 4 | 8218 |
| 5 | 18256 |
| 6 | 131600 |
| 7 | 291578 |
| 8 | 2097970 |
| 9 | 4647580 |
| 10 | 33436508 |
| 11 | 74070290 |
| 12 | 532886746 |
| 13 | 1180477648 |
| 14 | 8492752016 |
| 15 | 18813572666 |
| 16 | 135351146098 |
| 17 | 299836685596 |
| 18 | 2157125586140 |
| 19 | 4778573397458 |
| 20 | 34378658232730 |
| 21 | 76157337674320 |
| 22 | 547901406138128 |
| 23 | 1213738829392250 |