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 | 12 |
| 1 | 289 |
| 2 | 6948 |
| 3 | 167041 |
| 4 | 4015932 |
| 5 | 96549409 |
| 6 | 2321201748 |
| 7 | 55805391361 |
| 8 | 1341650594412 |
| 9 | 32255419657249 |
| 10 | 775471722368388 |
| 11 | 18643576756498561 |
| 12 | 448221313878333852 |
| 13 | 10775955109836511009 |
| 14 | 259071143949954598068 |
| 15 | 6228483409908746864641 |
| 16 | 149742672981759879349452 |