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 | 2 |
| 3 | 8 |
| 4 | 12 |
| 5 | 298 |
| 6 | 1230 |
| 7 | 10494 |
| 8 | 74543 |
| 9 | 238174 |
| 10 | 402385 |
| 11 | 608924 |
| 12 | 858896 |
| 13 | 1150972 |
| 14 | 1486709 |
| 15 | 1864309 |
| 16 | 2285798 |
| 17 | 91850628 |
| 18 | 4005374676 |
| 19 | 4028841935 |
| 20 | 69750785781 |
| 21 | 88657850823 |
| 22 | 95628273398 |
| 23 | 154486668208 |
| 24 | 3487100060522 |
| 25 | 49842735693373 |
| 26 | 263064249410400 |
| 27 | 751941667877632 |
| 28 | 1790364658467926 |
| 29 | 3748860728854527 |