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 | 3 |
| 2 | 3 |
| 3 | 16 |
| 4 | 36 |
| 5 | 211 |
| 6 | 971 |
| 7 | 1546 |
| 8 | 1619 |
| 9 | 1676 |
| 10 | 2781 |
| 11 | 5016 |
| 12 | 41282 |
| 13 | 342476 |
| 14 | 906352 |
| 15 | 1023757 |
| 16 | 1948794 |
| 17 | 7848891 |
| 18 | 13836275 |
| 19 | 30581008 |
| 20 | 38602286 |
| 21 | 170598710 |
| 22 | 379204788 |
| 23 | 619298045 |
| 24 | 725045787 |
| 25 | 1682291679 |
| 26 | 24640189358 |
| 27 | 24751265017 |
| 28 | 104930341224 |
| 29 | 139089631515 |
| 30 | 463053103677 |