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 | 1 |
| 2 | 20 |
| 3 | 90 |
| 4 | 336 |
| 5 | 650 |
| 6 | 1800 |
| 7 | 2450 |
| 8 | 5440 |
| 9 | 7371 |
| 10 | 13000 |
| 11 | 14762 |
| 12 | 30240 |
| 13 | 28730 |
| 14 | 49000 |
| 15 | 58500 |
| 16 | 87296 |
| 17 | 83810 |
| 18 | 147420 |
| 19 | 130682 |
| 20 | 218400 |
| 21 | 220500 |
| 22 | 295240 |
| 23 | 280370 |
| 24 | 489600 |
| 25 | 406875 |
| 26 | 574600 |
| 27 | 597780 |
| 28 | 823200 |
| 29 | 708122 |
| 30 | 1170000 |
| 31 | 924482 |
| 32 | 1397760 |
| 33 | 1328580 |
| 34 | 1676200 |
| 35 | 1592500 |
| 36 | 2476656 |