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 | 223092870 |
| 2 | 3234846615 |
| 3 | 33426748355 |
| 4 | 247357937827 |
| 5 | 1448810778701 |
| 6 | 5663533044013 |
| 7 | 20475850236047 |
| 8 | 63836474265323 |
| 9 | 198229051666003 |
| 10 | 525737919635921 |
| 11 | 1214635883296783 |
| 12 | 2781907990776503 |
| 13 | 5488629279099587 |