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 | 0 |
| 1 | 1 |
| 2 | 652 |
| 3 | 1656 |
| 4 | 63556 |
| 5 | 526093 |
| 6 | 6169761 |
| 7 | 1084675 |
| 8 | 61277761 |
| 9 | 12764034 |
| 10 | 1 |
| 11 | 188853412 |
| 12 | 696189924 |
| 13 | 127037518 |
| 14 | 6509875741 |
| 15 | 5260982652 |
| 16 | 6927694924 |
| 17 | 1447575796 |
| 18 | 67506991011 |
| 19 | 14036538961 |
| 20 | 652 |
| 21 | 16395822873 |
| 22 | 63537857845 |
| 23 | 18258901387 |
| 24 | 671413570011 |
| 25 | 526098785251 |