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 | 21 |
| 2 | 179 |
| 3 | 938 |
| 4 | 3612 |
| 5 | 11242 |
| 6 | 29947 |
| 7 | 70855 |
| 8 | 152720 |
| 9 | 305330 |
| 10 | 573812 |
| 11 | 1023939 |
| 12 | 1748545 |
| 13 | 2875153 |
| 14 | 4574922 |
| 15 | 7073018 |
| 16 | 10660515 |
| 17 | 15707931 |
| 18 | 22680505 |
| 19 | 32155320 |
| 20 | 44840378 |
| 21 | 61595732 |
| 22 | 83456781 |
| 23 | 111659833 |
| 24 | 147670042 |
| 25 | 193211824 |
| 26 | 250301858 |
| 27 | 321284777 |
| 28 | 408871655 |
| 29 | 516181395 |