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 | 9 |
| 1 | 163 |
| 2 | 2943 |
| 3 | 53137 |
| 4 | 959409 |
| 5 | 17322499 |
| 6 | 312764391 |
| 7 | 5647081537 |
| 8 | 101960232057 |
| 9 | 1840931258563 |
| 10 | 33238722886191 |
| 11 | 600137943210001 |
| 12 | 10835721700666209 |
| 13 | 195643128555201763 |
| 14 | 3532412035694297943 |
| 15 | 63779059771052564737 |
| 16 | 1151555487914640463209 |
| 17 | 20791777842234580902499 |