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 | 7560 |
| 2 | 20160 |
| 3 | 45360 |
| 4 | 50400 |
| 5 | 83160 |
| 6 | 221760 |
| 7 | 498960 |
| 8 | 1081080 |
| 9 | 2882880 |
| 10 | 6486480 |
| 11 | 14414400 |
| 12 | 17297280 |
| 13 | 32432400 |
| 14 | 43243200 |
| 15 | 110270160 |
| 16 | 245044800 |
| 17 | 294053760 |
| 18 | 551350800 |
| 19 | 2095133040 |
| 20 | 2205403200 |
| 21 | 4655851200 |
| 22 | 5587021440 |
| 23 | 10475665200 |
| 24 | 64250746560 |
| 25 | 73329656400 |
| 26 | 97772875200 |