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 | 11 |
| 3 | 37 |
| 4 | 108 |
| 5 | 533 |
| 6 | 2434 |
| 7 | 10287 |
| 8 | 45968 |
| 9 | 207906 |
| 10 | 927565 |
| 11 | 4149639 |
| 12 | 18631844 |
| 13 | 83542062 |
| 14 | 374482908 |
| 15 | 1679592819 |
| 16 | 7532686680 |
| 17 | 33779595704 |
| 18 | 151490828968 |
| 19 | 679394507158 |
| 20 | 3046851336221 |
| 21 | 13664151868643 |
| 22 | 61279503538129 |