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) |
|---|---|
| 2 | 5 |
| 3 | 2 |
| 4 | 3 |
| 5 | 3413 |
| 6 | 50069 |
| 7 | 8089 |
| 8 | 487 |
| 9 | 2099 |
| 10 | 10405071317 |
| 11 | 1274641129 |
| 12 | 164496735539 |
| 13 | 3514531963 |
| 14 | 15624709 |
| 15 | 23747111 |
| 16 | 10343539 |
| 17 | 56429700667 |
| 18 | 1931869473647715169 |
| 19 | 2383792821710269 |
| 20 | 144326697012150473 |
| 21 | 2053857208873393249 |
| 22 | 128801386946535261205906957 |
| 23 | 2298815880166789 |