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 | 11 |
| 4 | 57 |
| 5 | 68 |
| 6 | 125 |
| 7 | 2068 |
| 8 | 2193 |
| 9 | 4261 |
| 10 | 23498 |
| 11 | 121751 |
| 12 | 145249 |
| 13 | 267000 |
| 14 | 4417249 |
| 15 | 4684249 |
| 16 | 9101498 |
| 17 | 50191739 |
| 18 | 260060193 |
| 19 | 310251932 |
| 20 | 570312125 |
| 21 | 9435245932 |
| 22 | 10005558057 |
| 23 | 19440803989 |
| 24 | 107209578002 |
| 25 | 555488693999 |
| 26 | 662698272001 |
| 27 | 1218186966000 |
| 28 | 20153689728001 |