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 | 8 |
| 3 | 42 |
| 4 | 179 |
| 5 | 633 |
| 6 | 2001 |
| 7 | 5745 |
| 8 | 15274 |
| 9 | 38000 |
| 10 | 89331 |
| 11 | 199715 |
| 12 | 427184 |
| 13 | 878152 |
| 14 | 1741964 |
| 15 | 3345562 |
| 16 | 6239390 |
| 17 | 11327863 |
| 18 | 20065972 |
| 19 | 34747460 |
| 20 | 58924066 |
| 21 | 98002370 |
| 22 | 160086580 |
| 23 | 257148244 |
| 24 | 406637336 |
| 25 | 633669040 |
| 26 | 973971441 |
| 27 | 1477810227 |
| 28 | 2215179768 |
| 29 | 3282598034 |
| 30 | 4811946882 |