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 | 9 |
| 3 | 11 |
| 4 | 15 |
| 5 | 25 |
| 6 | 27 |
| 7 | 36 |
| 8 | 173 |
| 9 | 202 |
| 10 | 1965 |
| 11 | 10312 |
| 12 | 13538 |
| 13 | 31564 |
| 14 | 39844 |
| 15 | 88358 |
| 16 | 90936 |
| 17 | 171767 |
| 18 | 798975 |
| 19 | 1350952 |
| 20 | 1934096 |
| 21 | 4998490 |
| 22 | 6950469 |
| 23 | 16097930 |
| 24 | 30366857 |
| 25 | 201980012 |
| 26 | 280003359 |
| 27 | 726993911 |
| 28 | 6157450525 |
| 29 | 25921409405 |
| 30 | 26415716358 |