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 | 5 |
| 2 | 5 |
| 3 | 19 |
| 4 | 61 |
| 5 | 3221 |
| 6 | 37 |
| 7 | 45319 |
| 8 | 7321 |
| 9 | 1772893 |
| 10 | 13421 |
| 11 | 1806113 |
| 12 | 1117 |
| 13 | 3158528101 |
| 14 | 1623931 |
| 15 | 195019441 |
| 16 | 6304673 |
| 17 | 50544702849929377 |
| 18 | 1772893 |
| 19 | 6115909044841454629 |
| 20 | 212601841 |
| 21 | 45319 |
| 22 | 1806113 |
| 23 | 3740221981231 |
| 24 | 20113 |
| 25 | 1856458657451 |
| 26 | 3158528101 |
| 27 | 5559917315850179173 |