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) |
|---|---|
| 0 | 15 |
| 1 | 105 |
| 2 | 315 |
| 3 | 693 |
| 4 | 1287 |
| 5 | 2145 |
| 6 | 3315 |
| 7 | 4845 |
| 8 | 6783 |
| 9 | 9177 |
| 10 | 12075 |
| 11 | 15525 |
| 12 | 19575 |
| 13 | 24273 |
| 14 | 29667 |
| 15 | 35805 |
| 16 | 42735 |
| 17 | 50505 |
| 18 | 59163 |
| 19 | 68757 |
| 20 | 79335 |
| 21 | 90945 |
| 22 | 103635 |
| 23 | 117453 |
| 24 | 132447 |
| 25 | 148665 |
| 26 | 166155 |
| 27 | 184965 |
| 28 | 205143 |
| 29 | 226737 |
| 30 | 249795 |
| 31 | 274365 |
| 32 | 300495 |
| 33 | 328233 |
| 34 | 357627 |