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 | 29 |
| 2 | 841 |
| 3 | 12657 |
| 4 | 114713 |
| 5 | 748950 |
| 6 | 3907140 |
| 7 | 17224974 |
| 8 | 66448428 |
| 9 | 229624238 |
| 10 | 723456027 |
| 11 | 2106393383 |
| 12 | 5727793388 |
| 13 | 14669871333 |
| 14 | 35633091730 |
| 15 | 82556882471 |
| 16 | 183320486518 |
| 17 | 391738700030 |
| 18 | 808400385799 |
| 19 | 1615892668057 |
| 20 | 3136875572418 |