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 | 9 |
| 2 | 81 |
| 3 | 288 |
| 4 | 720 |
| 5 | 1485 |
| 6 | 2709 |
| 7 | 4536 |
| 8 | 7128 |
| 9 | 10665 |
| 10 | 15345 |
| 11 | 21384 |
| 12 | 29016 |
| 13 | 38493 |
| 14 | 50085 |
| 15 | 64080 |
| 16 | 80784 |
| 17 | 100521 |
| 18 | 123633 |
| 19 | 150480 |
| 20 | 181440 |
| 21 | 216909 |
| 22 | 257301 |
| 23 | 303048 |
| 24 | 354600 |
| 25 | 412425 |
| 26 | 477009 |
| 27 | 548856 |
| 28 | 628488 |
| 29 | 716445 |
| 30 | 813285 |
| 31 | 919584 |
| 32 | 1035936 |
| 33 | 1162953 |