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 | 266 |
| 1 | 6590 |
| 2 | 65601 |
| 3 | 390750 |
| 4 | 1679831 |
| 5 | 5765085 |
| 6 | 16777579 |
| 7 | 43047173 |
| 8 | 100000551 |
| 9 | 214359541 |
| 10 | 429982475 |
| 11 | 815731628 |
| 12 | 1475790101 |
| 13 | 2562891818 |
| 14 | 4294968647 |
| 15 | 6975758960 |
| 16 | 11019962273 |
| 17 | 16983564926 |
| 18 | 25600002083 |
| 19 | 37822861652 |
| 20 | 54875876045 |
| 21 | 78310988018 |
| 22 | 110075317151 |
| 23 | 152587893847 |