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 | 180 |
| 2 | 780 |
| 3 | 1872 |
| 4 | 2352 |
| 5 | 16830 |
| 6 | 17850 |
| 7 | 20496 |
| 8 | 51060 |
| 9 | 59724 |
| 10 | 64890 |
| 11 | 430272 |
| 12 | 884730 |
| 13 | 3767100 |
| 14 | 4946508 |
| 15 | 15287976 |
| 16 | 33806052 |
| 17 | 34747416 |
| 18 | 40974318 |
| 19 | 137168580 |
| 20 | 140492772 |
| 21 | 157048290 |
| 22 | 184773312 |
| 23 | 3615557148 |
| 24 | 16709332608 |
| 25 | 40564903620 |
| 26 | 40936559976 |
| 27 | 60782804964 |