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 | 2 |
| 2 | 7 |
| 3 | 26 |
| 4 | 101 |
| 5 | 404 |
| 6 | 1645 |
| 7 | 6784 |
| 8 | 28243 |
| 9 | 118442 |
| 10 | 499601 |
| 11 | 2117366 |
| 12 | 9008969 |
| 13 | 38458644 |
| 14 | 164643197 |
| 15 | 706574780 |
| 16 | 3038800419 |
| 17 | 13093784762 |
| 18 | 56513880913 |
| 19 | 244283771986 |
| 20 | 1057348164103 |
| 21 | 4582148496448 |
| 22 | 19879232544027 |
| 23 | 86331108851932 |
| 24 | 375262802895691 |
| 25 | 1632570339730086 |
| 26 | 7108008200622949 |