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 | 0 |
| 2 | 13 |
| 3 | 31 |
| 4 | 658 |
| 5 | 8840 |
| 6 | 141313 |
| 7 | 2141384 |
| 8 | 33329847 |
| 9 | 514990479 |
| 10 | 7988200496 |
| 11 | 123822198215 |
| 12 | 1920693558801 |
| 13 | 29793765165720 |
| 14 | 462205529321051 |
| 15 | 7170401050696078 |
| 16 | 111238701384104135 |
| 17 | 1725707750909016718 |