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 | 3 |
| 2 | 15 |
| 3 | 26 |
| 4 | 81 |
| 5 | 130 |
| 6 | 350 |
| 7 | 558 |
| 8 | 1417 |
| 9 | 2282 |
| 10 | 5632 |
| 11 | 9190 |
| 12 | 22296 |
| 13 | 36834 |
| 14 | 88280 |
| 15 | 147422 |
| 16 | 349929 |
| 17 | 589786 |
| 18 | 1388672 |
| 19 | 2359254 |
| 20 | 5516356 |
| 21 | 9437138 |
| 22 | 21931190 |
| 23 | 37748686 |
| 24 | 87250096 |
| 25 | 150994890 |
| 26 | 347306730 |
| 27 | 603979718 |
| 28 | 1383135310 |
| 29 | 2415919042 |