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 | 4 |
| 3 | 7 |
| 4 | 35 |
| 5 | 140 |
| 6 | 731 |
| 7 | 3740 |
| 8 | 20888 |
| 9 | 118137 |
| 10 | 687981 |
| 11 | 4059192 |
| 12 | 24292229 |
| 13 | 146840708 |
| 14 | 895753665 |
| 15 | 5505619880 |
| 16 | 34065921090 |