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 | 531 |
| 2 | 5052 |
| 3 | 24553 |
| 4 | 107833 |
| 5 | 999759 |
| 6 | 2447517 |
| 7 | 5494392 |
| 8 | 21711067 |
| 9 | 68562129 |
| 10 | 287617189 |
| 11 | 437995549 |
| 12 | 946912755 |
| 13 | 3567919999 |
| 14 | 6370211253 |
| 15 | 10880553708 |
| 16 | 17891119105 |
| 17 | 28464383127 |
| 18 | 35505127221 |
| 19 | 97650322329 |
| 20 | 199757104357 |
| 21 | 278459342139 |
| 22 | 517897029319 |
| 23 | 692671751805 |