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 | 15170835645 |
| 2 | 208438080643 |
| 3 | 320465258659 |
| 4 | 1658465000647 |
| 5 | 3290217425101 |
| 6 | 3938530307257 |
| 7 | 7169838686017 |
| 8 | 13112542594333 |
| 9 | 24641518275703 |
| 10 | 36592635038993 |
| 11 | 36848138663889 |
| 12 | 41332017729268 |
| 13 | 74051580874005 |