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 | 1 |
| 1 | 6 |
| 2 | 19 |
| 3 | 68 |
| 4 | 242 |
| 5 | 704 |
| 6 | 1981 |
| 7 | 5140 |
| 8 | 12364 |
| 9 | 27614 |
| 10 | 57598 |
| 11 | 113108 |
| 12 | 210812 |
| 13 | 375606 |
| 14 | 643646 |
| 15 | 1066196 |
| 16 | 1714445 |
| 17 | 2685464 |
| 18 | 4109493 |
| 19 | 6158768 |
| 20 | 9058119 |
| 21 | 13097592 |
| 22 | 18647371 |
| 23 | 26175300 |
| 24 | 36267330 |
| 25 | 49651242 |
| 26 | 67224024 |
| 27 | 90083308 |
| 28 | 119563302 |