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 | 3 |
| 2 | 6 |
| 3 | 66 |
| 4 | 171 |
| 5 | 2211 |
| 6 | 5778 |
| 7 | 75078 |
| 8 | 196251 |
| 9 | 2550411 |
| 10 | 6666726 |
| 11 | 86638866 |
| 12 | 226472403 |
| 13 | 2943171003 |
| 14 | 7693394946 |
| 15 | 99981175206 |
| 16 | 261348955731 |
| 17 | 3396416785971 |
| 18 | 8878171099878 |
| 19 | 115378189547778 |
| 20 | 301596468440091 |
| 21 | 3919462027838451 |
| 22 | 10245401755863186 |
| 23 | 133146330756959526 |
| 24 | 348042063230908203 |