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 | 2 |
| 2 | 37 |
| 3 | 76 |
| 4 | 1405 |
| 5 | 2886 |
| 6 | 53353 |
| 7 | 109592 |
| 8 | 2026009 |
| 9 | 4161610 |
| 10 | 76934989 |
| 11 | 158031588 |
| 12 | 2921503573 |
| 13 | 6001038734 |
| 14 | 110940200785 |
| 15 | 227881440304 |
| 16 | 4212806126257 |
| 17 | 8653493692818 |
| 18 | 159975692596981 |
| 19 | 328604878886780 |