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 | 3 |
| 1 | 43 |
| 2 | 311 |
| 3 | 1551 |
| 4 | 6061 |
| 5 | 19877 |
| 6 | 57057 |
| 7 | 147433 |
| 8 | 349778 |
| 9 | 773058 |
| 10 | 1609322 |
| 11 | 3182842 |
| 12 | 6021366 |
| 13 | 10956806 |
| 14 | 19264366 |
| 15 | 32851038 |
| 16 | 54506573 |
| 17 | 88232485 |
| 18 | 139667385 |
| 19 | 216629985 |
| 20 | 329804475 |
| 21 | 493596675 |
| 22 | 727193415 |
| 23 | 1055862015 |