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 | 5 |
| 2 | 23 |
| 3 | 93 |
| 4 | 332 |
| 5 | 1062 |
| 6 | 3117 |
| 7 | 8399 |
| 8 | 21051 |
| 9 | 49451 |
| 10 | 109698 |
| 11 | 231230 |
| 12 | 465900 |
| 13 | 901425 |
| 14 | 1681989 |
| 15 | 3037536 |