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 | 15 |
| 3 | 149 |
| 4 | 1415 |
| 5 | 4585 |
| 6 | 14585 |
| 7 | 105935 |
| 8 | 364585 |
| 9 | 3496101 |
| 10 | 4714045 |
| 11 | 34964585 |
| 12 | 149305935 |
| 13 | 1490725415 |
| 14 | 4714469665 |
| 15 | 1490711985 |
| 16 | 149071333335 |
| 17 | 1105537083332 |
| 18 | 1489973900149 |
| 19 | 15106363633335 |
| 20 | 47140462469223 |
| 21 | 450246846657722 |
| 22 | 1490713327333335 |
| 23 | 4714049454791668 |
| 24 | 47129833685493335 |
| 25 | 27788886667555111 |