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 | 163 |
| 2 | 4645 |
| 3 | 57799 |
| 4 | 432073 |
| 5 | 2286955 |
| 6 | 9446125 |
| 7 | 32398735 |
| 8 | 96220561 |
| 9 | 254831667 |
| 10 | 614859189 |
| 11 | 1373356887 |
| 12 | 2874747225 |
| 13 | 5693596923 |
| 14 | 10751213181 |
| 15 | 19475555103 |
| 16 | 34015593249 |
| 17 | 57523019715 |
| 18 | 94516111685 |
| 19 | 151342583015 |
| 20 | 236760421097 |
| 21 | 362658000011 |
| 22 | 544937185805 |
| 23 | 804585705647 |