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 | 1 |
| 2 | 9 |
| 3 | 135 |
| 4 | 231 |
| 5 | 765 |
| 6 | 1045 |
| 7 | 2275 |
| 8 | 2835 |
| 9 | 5049 |
| 10 | 5985 |
| 11 | 9471 |
| 12 | 10879 |
| 13 | 15925 |
| 14 | 17901 |
| 15 | 24795 |
| 16 | 27435 |
| 17 | 36465 |
| 18 | 39865 |
| 19 | 51319 |
| 20 | 55575 |
| 21 | 69741 |
| 22 | 74949 |
| 23 | 92115 |
| 24 | 98371 |
| 25 | 118825 |
| 26 | 126225 |
| 27 | 150255 |
| 28 | 158895 |
| 29 | 186789 |
| 30 | 196765 |
| 31 | 228811 |
| 32 | 240219 |
| 33 | 276705 |
| 34 | 289641 |
| 35 | 330855 |
| 36 | 345415 |
| 37 | 391645 |
| 38 | 407925 |