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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | 3 |
| 7 | 9 |
| 8 | 19 |
| 9 | 36 |
| 10 | 62 |
| 11 | 102 |
| 12 | 153 |
| 13 | 229 |
| 14 | 324 |
| 15 | 447 |
| 16 | 603 |
| 17 | 798 |
| 18 | 1029 |
| 19 | 1318 |
| 20 | 1657 |
| 21 | 2055 |
| 22 | 2528 |
| 23 | 3077 |
| 24 | 3699 |
| 25 | 4430 |
| 26 | 5250 |
| 27 | 6180 |