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 | 4 |
| 2 | 49 |
| 3 | 246 |
| 4 | 834 |
| 5 | 2250 |
| 6 | 5214 |
| 7 | 10829 |
| 8 | 20696 |
| 9 | 37044 |
| 10 | 62875 |
| 11 | 102124 |
| 12 | 159834 |
| 13 | 242346 |
| 14 | 357504 |
| 15 | 514875 |
| 16 | 725984 |
| 17 | 1004564 |
| 18 | 1366821 |
| 19 | 1831714 |
| 20 | 2421250 |
| 21 | 3160794 |
| 22 | 4079394 |
| 23 | 5210121 |
| 24 | 6590424 |
| 25 | 8262500 |
| 26 | 10273679 |
| 27 | 12676824 |
| 28 | 15530746 |
| 29 | 18900634 |
| 30 | 22858500 |