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) |
|---|---|
| 1 | 44 |
| 2 | 180 |
| 3 | 804 |
| 4 | 2818 |
| 5 | 9991 |
| 6 | 29995 |
| 7 | 90225 |
| 8 | 241945 |
| 9 | 649320 |
| 10 | 1605951 |
| 11 | 3974215 |
| 12 | 9269399 |
| 13 | 21628177 |
| 14 | 48322967 |
| 15 | 107991481 |
| 16 | 233776405 |
| 17 | 506133563 |
| 18 | 1070574873 |
| 19 | 2264593031 |
| 20 | 4710021487 |
| 21 | 9796211590 |
| 22 | 20129009598 |
| 23 | 41359935334 |
| 24 | 84255978136 |
| 25 | 171637137305 |