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 | 1 |
| 2 | 12 |
| 3 | 155 |
| 4 | 2003 |
| 5 | 25884 |
| 6 | 334489 |
| 7 | 4322473 |
| 8 | 55857660 |
| 9 | 721827107 |
| 10 | 9327894731 |
| 11 | 120540804396 |
| 12 | 1557702562417 |
| 13 | 20129592507025 |
| 14 | 260127000028908 |
| 15 | 3361521407868779 |
| 16 | 43439651302265219 |
| 17 | 561353945521579068 |