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 | 1 |
| 2 | 362 |
| 3 | 3363 |
| 4 | 15124 |
| 5 | 47525 |
| 6 | 120126 |
| 7 | 262087 |
| 8 | 514088 |
| 9 | 930249 |
| 10 | 1580050 |
| 11 | 2550251 |
| 12 | 3946812 |
| 13 | 5896813 |
| 14 | 8550374 |
| 15 | 12082575 |
| 16 | 16695376 |
| 17 | 22619537 |
| 18 | 30116538 |
| 19 | 39480499 |
| 20 | 51040100 |
| 21 | 65160501 |
| 22 | 82245262 |
| 23 | 102738263 |
| 24 | 127125624 |
| 25 | 155937625 |
| 26 | 189750626 |
| 27 | 229188987 |