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 | 2 |
| 2 | 3 |
| 3 | 8 |
| 4 | 23 |
| 5 | 74 |
| 6 | 227 |
| 7 | 704 |
| 8 | 2135 |
| 9 | 6482 |
| 10 | 19523 |
| 11 | 58808 |
| 12 | 176663 |
| 13 | 530714 |
| 14 | 1592867 |
| 15 | 4780784 |
| 16 | 14344535 |
| 17 | 43040162 |
| 18 | 129127043 |
| 19 | 387400808 |
| 20 | 1162222103 |
| 21 | 3486725354 |
| 22 | 10460235107 |
| 23 | 31380882464 |
| 24 | 94142824535 |
| 25 | 282429005042 |