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 | 6 |
| 3 | 29 |
| 4 | 299 |
| 5 | 3127 |
| 6 | 48360 |
| 7 | 823545 |
| 8 | 16918164 |
| 9 | 387462126 |
| 10 | 10019541652 |
| 11 | 285311670613 |
| 12 | 8920567022545 |
| 13 | 302875106592255 |
| 14 | 11113363273445312 |
| 15 | 437893951476881153 |
| 16 | 18447309245488431653 |
| 17 | 827240261886336764179 |
| 18 | 39346708488214110663954 |
| 19 | 1978419655660313589123981 |