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 | 4 |
| 2 | 11 |
| 3 | 32 |
| 4 | 77 |
| 5 | 212 |
| 6 | 503 |
| 7 | 1376 |
| 8 | 3257 |
| 9 | 8900 |
| 10 | 21059 |
| 11 | 57536 |
| 12 | 136133 |
| 13 | 371924 |
| 14 | 879983 |
| 15 | 2404160 |
| 16 | 5688305 |
| 17 | 15540740 |
| 18 | 36769787 |
| 19 | 100456928 |
| 20 | 237683645 |
| 21 | 649363796 |
| 22 | 1536411239 |
| 23 | 4197553568 |
| 24 | 9931518377 |
| 25 | 27133412804 |
| 26 | 64198343987 |