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 | 7 |
| 2 | 41 |
| 3 | 9 |
| 4 | 239 |
| 5 | 6227 |
| 6 | 32059 |
| 7 | 163727 |
| 8 | 166301 |
| 9 | 841229 |
| 10 | 21215481 |
| 11 | 106782837 |
| 12 | 536618341 |
| 13 | 538698461 |
| 14 | 172897 |
| 15 | 13538601629 |
| 16 | 67813224223 |
| 17 | 339532842359 |
| 18 | 339895847771 |
| 19 | 1700893049407 |
| 20 | 42549895540939 |
| 21 | 212857129279583 |
| 22 | 1064706466190659 |
| 23 | 1065035803419763 |
| 24 | 5326468921246139 |