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 | 5 |
| 3 | 29 |
| 4 | 169 |
| 5 | 985 |
| 6 | 5741 |
| 7 | 33461 |
| 8 | 195025 |
| 9 | 1136689 |
| 10 | 6625109 |
| 11 | 38613965 |
| 12 | 225058681 |
| 13 | 1311738121 |
| 14 | 7645370045 |
| 15 | 44560482149 |
| 16 | 259717522849 |
| 17 | 1513744654945 |
| 18 | 8822750406821 |
| 19 | 51422757785981 |
| 20 | 299713796309065 |
| 21 | 1746860020068409 |
| 22 | 10181446324101389 |
| 23 | 59341817924539925 |