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 | 0 |
| 2 | 3 |
| 3 | 16 |
| 4 | 60 |
| 5 | 168 |
| 6 | 385 |
| 7 | 768 |
| 8 | 1386 |
| 9 | 2320 |
| 10 | 3663 |
| 11 | 5520 |
| 12 | 8008 |
| 13 | 11256 |
| 14 | 15405 |
| 15 | 20608 |
| 16 | 27030 |
| 17 | 34848 |
| 18 | 44251 |
| 19 | 55440 |
| 20 | 68628 |
| 21 | 84040 |
| 22 | 101913 |
| 23 | 122496 |
| 24 | 146050 |
| 25 | 172848 |
| 26 | 203175 |
| 27 | 237328 |
| 28 | 275616 |
| 29 | 318360 |
| 30 | 365893 |
| 31 | 418560 |
| 32 | 476718 |
| 33 | 540736 |
| 34 | 610995 |
| 35 | 687888 |
| 36 | 771820 |
| 37 | 863208 |
| 38 | 962481 |
| 39 | 1070080 |
| 40 | 1186458 |