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 | 21 |
| 1 | 206 |
| 2 | 917 |
| 3 | 2757 |
| 4 | 6571 |
| 5 | 13446 |
| 6 | 24711 |
| 7 | 41937 |
| 8 | 66937 |
| 9 | 101766 |
| 10 | 148721 |
| 11 | 210341 |
| 12 | 289407 |
| 13 | 388942 |
| 14 | 512211 |
| 15 | 662721 |
| 16 | 844221 |
| 17 | 1060702 |
| 18 | 1316397 |
| 19 | 1615781 |
| 20 | 1963571 |
| 21 | 2364726 |
| 22 | 2824447 |
| 23 | 3348177 |
| 24 | 3941601 |
| 25 | 4610646 |
| 26 | 5361481 |
| 27 | 6200517 |
| 28 | 7134407 |