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 | 1 |
| 2 | 1 |
| 3 | 101 |
| 4 | 71 |
| 5 | 181 |
| 6 | 39161 |
| 7 | 24571 |
| 8 | 12301 |
| 9 | 1158551 |
| 10 | 87382901 |
| 11 | 21211 |
| 12 | 373270451 |
| 13 | 28143378001 |
| 14 | 32414581 |
| 15 | 1322154751061 |
| 16 | 9062194370461 |
| 17 | 1550853481 |
| 18 | 2819407321151 |
| 19 | 265272771839851 |
| 20 | 2366632711 |
| 21 | 137083914639998701 |
| 22 | 85417012034751151 |
| 23 | 3455782010101 |