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 | 19 |
| 2 | 135 |
| 3 | 540 |
| 4 | 1610 |
| 5 | 3990 |
| 6 | 8694 |
| 7 | 17220 |
| 8 | 31680 |
| 9 | 54945 |
| 10 | 90805 |
| 11 | 144144 |
| 12 | 221130 |
| 13 | 329420 |
| 14 | 478380 |
| 15 | 679320 |
| 16 | 945744 |
| 17 | 1293615 |
| 18 | 1741635 |
| 19 | 2311540 |
| 20 | 3028410 |
| 21 | 3920994 |
| 22 | 5022050 |
| 23 | 6368700 |
| 24 | 8002800 |
| 25 | 9971325 |
| 26 | 12326769 |
| 27 | 15127560 |
| 28 | 18438490 |
| 29 | 22331160 |
| 30 | 26884440 |
| 31 | 32184944 |
| 32 | 38327520 |