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 | 11 |
| 2 | 181 |
| 3 | 165 |
| 4 | 26999 |
| 5 | 4895 |
| 6 | 1115101 |
| 7 | 143605 |
| 8 | 23237999 |
| 9 | 4166811 |
| 10 | 1475406905 |
| 11 | 119617025 |
| 12 | 1742885234309 |
| 13 | 3398893927 |
| 14 | 108310818427 |
| 15 | 95651256525 |
| 16 | 257902525256383 |
| 17 | 2667741493043 |
| 18 | 11207490797724247 |
| 19 | 73792284074905 |
| 20 | 127706878337270389 |
| 21 | 2025879053128959 |
| 22 | 1461061845512534573 |