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 | 3 |
| 3 | 17 |
| 4 | 53 |
| 5 | 62 |
| 6 | 163 |
| 7 | 717 |
| 8 | 3489 |
| 9 | 3727 |
| 10 | 43391 |
| 11 | 45596 |
| 12 | 619313 |
| 13 | 644063 |
| 14 | 667229 |
| 15 | 2756003 |
| 16 | 24124223 |
| 17 | 24784883 |
| 18 | 160941559 |
| 19 | 164719333 |
| 20 | 33664415 |
| 21 | 11451017 |
| 22 | 268428987 |
| 23 | 819836496 |
| 24 | 20845424563 |
| 25 | 21181779967 |
| 26 | 193553388003 |
| 27 | 196368607553 |
| 28 | 5773568883787 |
| 29 | 5849866645327 |