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 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 42 |
| 5 | 61 |
| 6 | 88 |
| 7 | 238 |
| 8 | 254 |
| 9 | 288 |
| 10 | 347 |
| 11 | 575 |
| 12 | 4034 |
| 13 | 9853 |
| 14 | 21798 |
| 15 | 49736 |
| 16 | 108435 |
| 17 | 109003 |
| 18 | 181562 |
| 19 | 1035352 |
| 20 | 1955976 |
| 21 | 6950275 |
| 22 | 30712753 |
| 23 | 41463747 |
| 24 | 45117343 |
| 25 | 112401242 |
| 26 | 116579541 |