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 | 3 |
| 2 | 6 |
| 3 | 13 |
| 4 | 38 |
| 5 | 159 |
| 6 | 880 |
| 7 | 5921 |
| 8 | 46242 |
| 9 | 409123 |
| 10 | 4037924 |
| 11 | 43954725 |
| 12 | 522956326 |
| 13 | 6749977127 |
| 14 | 93928268328 |
| 15 | 1401602636329 |
| 16 | 22324392524330 |
| 17 | 378011820620331 |
| 18 | 6780385526348332 |
| 19 | 128425485935180333 |
| 20 | 2561327494111820334 |
| 21 | 53652269665821260335 |
| 22 | 1177652997443428940336 |