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 | 7 |
| 3 | 10 |
| 4 | 13 |
| 5 | 52 |
| 6 | 451 |
| 7 | 1075 |
| 8 | 6487 |
| 9 | 6265 |
| 10 | 44743 |
| 11 | 119923 |
| 12 | 302545 |
| 13 | 147298 |
| 14 | 589192 |
| 15 | 11922706 |
| 16 | 33341917 |
| 17 | 4227505 |
| 18 | 146050183 |
| 19 | 584200732 |
| 20 | 1174541461 |
| 21 | 4698165844 |
| 22 | 18792663376 |
| 23 | 43789593895 |
| 24 | 175158375580 |
| 25 | 700633502320 |
| 26 | 1955245399837 |
| 27 | 2737249942690 |
| 28 | 18574597255747 |