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 | 1 |
| 2 | 30 |
| 3 | 210 |
| 4 | 330 |
| 5 | 2310 |
| 6 | 3990 |
| 7 | 6090 |
| 8 | 14790 |
| 9 | 43890 |
| 10 | 66990 |
| 11 | 82110 |
| 12 | 125970 |
| 13 | 144210 |
| 14 | 181830 |
| 15 | 881790 |
| 16 | 1009470 |
| 17 | 1067430 |
| 18 | 1217370 |
| 19 | 2284590 |
| 20 | 2381190 |
| 21 | 17687670 |
| 22 | 18888870 |
| 23 | 26265030 |
| 24 | 35068110 |
| 25 | 39544890 |
| 26 | 47763870 |
| 27 | 115223790 |
| 28 | 127652070 |
| 29 | 406816410 |
| 30 | 497668710 |
| 31 | 741110370 |
| 32 | 1024748670 |