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 | 256 |
| 2 | 4057 |
| 3 | 28610 |
| 4 | 132263 |
| 5 | 469116 |
| 6 | 1384813 |
| 7 | 3570086 |
| 8 | 8291391 |
| 9 | 17720746 |
| 10 | 35389651 |
| 11 | 66794740 |
| 12 | 120185585 |
| 13 | 207567842 |
| 14 | 345957699 |
| 15 | 558926356 |
| 16 | 878476037 |
| 17 | 1347291804 |
| 18 | 2021416213 |
| 19 | 2973396622 |
| 20 | 4295957731 |
| 21 | 6106254704 |
| 22 | 8550764993 |
| 23 | 11810879754 |