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) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 24 |
| 4 | 324 |
| 5 | 1692 |
| 6 | 5796 |
| 7 | 15516 |
| 8 | 35388 |
| 9 | 71988 |
| 10 | 134460 |
| 11 | 234972 |
| 12 | 389304 |
| 13 | 617400 |
| 14 | 943992 |
| 15 | 1399272 |
| 16 | 2019528 |
| 17 | 2847960 |
| 18 | 3935304 |
| 19 | 5340816 |
| 20 | 7132860 |
| 21 | 9390084 |
| 22 | 12201948 |
| 23 | 15670116 |
| 24 | 19908900 |
| 25 | 25046892 |
| 26 | 31227300 |
| 27 | 38609844 |
| 28 | 47370960 |
| 29 | 57705984 |
| 30 | 69829200 |
| 31 | 83976336 |
| 32 | 100404432 |