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 | 7 |
| 3 | 38 |
| 4 | 198 |
| 5 | 1039 |
| 6 | 5533 |
| 7 | 29852 |
| 8 | 162716 |
| 9 | 893997 |
| 10 | 4942723 |
| 11 | 27466082 |
| 12 | 153264066 |
| 13 | 858230875 |
| 14 | 4820155001 |
| 15 | 27141345912 |
| 16 | 153168964216 |
| 17 | 866086326425 |
| 18 | 4905744855359 |
| 19 | 27830459812830 |
| 20 | 158102366711550 |
| 21 | 899290473825511 |
| 22 | 5120997554408597 |
| 23 | 29191620055374228 |
| 24 | 166560724629655188 |