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 | 241 |
| 3 | 26641 |
| 4 | 338401 |
| 5 | 2240161 |
| 6 | 10242001 |
| 7 | 36638641 |
| 8 | 109907521 |
| 9 | 288653761 |
| 10 | 683158321 |
| 11 | 1486914001 |
| 12 | 3020862241 |
| 13 | 5793372001 |
| 14 | 10579330321 |
| 15 | 18522042481 |
| 16 | 31261968001 |
| 17 | 51096647041 |
| 18 | 81176500081 |
| 19 | 125741512081 |
| 20 | 190404140641 |
| 21 | 282484116001 |
| 22 | 411401129041 |
| 23 | 589131731761 |