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 | 2 |
| 1 | 10 |
| 2 | 74 |
| 3 | 518 |
| 4 | 3934 |
| 5 | 29914 |
| 6 | 232094 |
| 7 | 1812890 |
| 8 | 14277886 |
| 9 | 113016230 |
| 10 | 898797262 |
| 11 | 7173454238 |
| 12 | 57431351010 |
| 13 | 460989676450 |
| 14 | 3708603354110 |
| 15 | 29893215059758 |