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 | 3 |
| 3 | 11 |
| 4 | 25 |
| 5 | 137 |
| 6 | 127 |
| 7 | 949 |
| 8 | 2003 |
| 9 | 7129 |
| 10 | 7381 |
| 11 | 83711 |
| 12 | 86021 |
| 13 | 1145993 |
| 14 | 1171733 |
| 15 | 1195757 |
| 16 | 2436559 |
| 17 | 42142223 |
| 18 | 41461543 |
| 19 | 800021557 |
| 20 | 788381929 |
| 21 | 799467289 |
| 22 | 810048769 |
| 23 | 18863914247 |
| 24 | 19087007117 |
| 25 | 99182995801 |
| 26 | 100212655201 |
| 27 | 312536252003 |
| 28 | 315404588903 |