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 | 2 |
| 2 | 8 |
| 3 | 21 |
| 4 | 48 |
| 5 | 95 |
| 6 | 180 |
| 7 | 315 |
| 8 | 536 |
| 9 | 873 |
| 10 | 1390 |
| 11 | 2145 |
| 12 | 3264 |
| 13 | 4849 |
| 14 | 7112 |
| 15 | 10260 |
| 16 | 14640 |
| 17 | 20604 |
| 18 | 28746 |
| 19 | 39653 |
| 20 | 54280 |
| 21 | 73626 |
| 22 | 99176 |
| 23 | 132549 |
| 24 | 176112 |
| 25 | 232400 |
| 26 | 305032 |
| 27 | 398034 |
| 28 | 516880 |
| 29 | 667725 |
| 30 | 858870 |