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 | 4 |
| 1 | 29 |
| 2 | 120 |
| 3 | 372 |
| 4 | 960 |
| 5 | 2178 |
| 6 | 4488 |
| 7 | 8580 |
| 8 | 15444 |
| 9 | 26455 |
| 10 | 43472 |
| 11 | 68952 |
| 12 | 106080 |
| 13 | 158916 |
| 14 | 232560 |
| 15 | 333336 |
| 16 | 468996 |
| 17 | 648945 |
| 18 | 884488 |
| 19 | 1189100 |
| 20 | 1578720 |
| 21 | 2072070 |
| 22 | 2691000 |
| 23 | 3460860 |
| 24 | 4410900 |
| 25 | 5574699 |
| 26 | 6990624 |
| 27 | 8702320 |
| 28 | 10759232 |
| 29 | 13217160 |
| 30 | 16138848 |