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) |
|---|---|
| 0 | 1 |
| 1 | 25 |
| 2 | 439 |
| 3 | 6685 |
| 4 | 94471 |
| 5 | 1276405 |
| 6 | 16745119 |
| 7 | 215226205 |
| 8 | 2725568791 |
| 9 | 34135388485 |
| 10 | 423910350799 |
| 11 | 5229781276525 |
| 12 | 64185946519111 |
| 13 | 784517071831765 |
| 14 | 9557062002788479 |
| 15 | 116113315455883645 |
| 16 | 1407645499737869431 |