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 | 4 |
| 4 | 10 |
| 5 | 17 |
| 6 | 49 |
| 7 | 93 |
| 8 | 359 |
| 9 | 1138 |
| 10 | 3802 |
| 11 | 12124 |
| 12 | 52844 |
| 13 | 182752 |
| 14 | 696647 |
| 15 | 2852886 |
| 16 | 16423633 |
| 17 | 75301815 |
| 18 | 367900714 |
| 19 | 1531612895 |
| 20 | 8389371542 |
| 21 | 40423852287 |
| 22 | 213232272280 |
| 23 | 1295095864798 |
| 24 | 7991762413764 |
| 25 | 42259876674716 |
| 26 | 252869570952706 |
| 27 | 1378634826630301 |
| 28 | 8749244047999717 |