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 | 990000 |
| 2 | 1940400 |
| 3 | 2227500 |
| 4 | 6187500 |
| 5 | 35640000 |
| 6 | 54212400 |
| 7 | 57182400 |
| 8 | 74933100 |
| 9 | 159677100 |
| 10 | 164745900 |
| 11 | 167310000 |
| 12 | 194040000 |
| 13 | 289485900 |
| 14 | 380318400 |
| 15 | 424205100 |
| 16 | 496742400 |
| 17 | 664101900 |
| 18 | 684773100 |
| 19 | 902919600 |
| 20 | 976100400 |
| 21 | 982327500 |
| 22 | 1007433900 |