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 | 28 |
| 2 | 154 |
| 3 | 627 |
| 4 | 2414 |
| 5 | 9201 |
| 6 | 35094 |
| 7 | 134259 |
| 8 | 515302 |
| 9 | 1983678 |
| 10 | 7656374 |
| 11 | 29619728 |
| 12 | 114822606 |
| 13 | 445925707 |
| 14 | 1734610302 |
| 15 | 6757306947 |
| 16 | 26358212502 |
| 17 | 102937963242 |
| 18 | 402444721782 |
| 19 | 1574952822852 |
| 20 | 6169131608622 |
| 21 | 24184904949252 |
| 22 | 94885715007390 |
| 23 | 372536351222832 |
| 24 | 1463611239163614 |
| 25 | 5753766284232606 |
| 26 | 22632379126906174 |
| 27 | 89072478723401106 |