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 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 51 |
| 5 | 25 |
| 6 | 302 |
| 7 | 778 |
| 8 | 414 |
| 9 | 74112 |
| 10 | 579511 |
| 11 | 75876 |
| 12 | 7953124 |
| 13 | 73444672 |
| 14 | 223998091 |
| 15 | 5458592831 |
| 16 | 74124108401 |
| 17 | 40896846828 |
| 18 | 951608670286 |
| 19 | 7505022472385 |
| 20 | 27353285142715 |
| 21 | 157651618968474 |
| 22 | 3237448375176054 |
| 23 | 64348055850025144 |
| 24 | 982508492968859544 |