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 | 0 |
| 2 | 15 |
| 3 | 80 |
| 4 | 255 |
| 5 | 624 |
| 6 | 1295 |
| 7 | 2400 |
| 8 | 4095 |
| 9 | 6560 |
| 10 | 9999 |
| 11 | 14640 |
| 12 | 20735 |
| 13 | 28560 |
| 14 | 38415 |
| 15 | 50624 |
| 16 | 65535 |
| 17 | 83520 |
| 18 | 104975 |
| 19 | 130320 |
| 20 | 159999 |
| 21 | 194480 |
| 22 | 234255 |
| 23 | 279840 |
| 24 | 331775 |
| 25 | 390624 |
| 26 | 456975 |
| 27 | 531440 |
| 28 | 614655 |
| 29 | 707280 |
| 30 | 809999 |
| 31 | 923520 |
| 32 | 1048575 |
| 33 | 1185920 |
| 34 | 1336335 |