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 | 0 |
| 1 | 1 |
| 2 | 362 |
| 3 | 11363 |
| 4 | 131072 |
| 5 | 873464 |
| 6 | 4114202 |
| 7 | 15252229 |
| 8 | 47453132 |
| 9 | 129140163 |
| 10 | 316227766 |
| 11 | 710947978 |
| 12 | 1489500287 |
| 13 | 2941158941 |
| 14 | 5521897022 |
| 15 | 9926032708 |
| 16 | 17179869184 |
| 17 | 28761784747 |
| 18 | 46753733110 |
| 19 | 74029634996 |
| 20 | 114486680447 |