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 | 1 |
| 2 | 11 |
| 3 | 16 |
| 4 | 47 |
| 5 | 147 |
| 6 | 386 |
| 7 | 1065 |
| 8 | 3063 |
| 9 | 8624 |
| 10 | 24219 |
| 11 | 68527 |
| 12 | 193946 |
| 13 | 547869 |
| 14 | 1548531 |
| 15 | 4380048 |
| 16 | 12385479 |
| 17 | 35018011 |
| 18 | 99025330 |
| 19 | 280031137 |
| 20 | 791849343 |
| 21 | 2239169200 |
| 22 | 6331964803 |
| 23 | 17905479095 |
| 24 | 50632882698 |
| 25 | 143179634869 |
| 26 | 404883140379 |