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 | 6 |
| 3 | 63 |
| 4 | 873 |
| 5 | 8325 |
| 6 | 5994 |
| 7 | 46953 |
| 8 | 817182 |
| 9 | 2903094 |
| 10 | 46581471 |
| 11 | 628884972 |
| 12 | 2389033773 |
| 13 | 83620243341 |
| 14 | 640064127105 |
| 15 | 362674830483 |
| 16 | 8982898406712 |
| 17 | 27204409379835 |
| 18 | 10972654622361 |
| 19 | 66143772953856 |
| 20 | 631327736268693 |
| 21 | 8512167146697873 |
| 22 | 83278108820037015 |
| 23 | 90222029256866994 |