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 | 315 |
| 2 | 1287 |
| 3 | 3315 |
| 4 | 6783 |
| 5 | 12075 |
| 6 | 19575 |
| 7 | 29667 |
| 8 | 42735 |
| 9 | 59163 |
| 10 | 79335 |
| 11 | 103635 |
| 12 | 132447 |
| 13 | 166155 |
| 14 | 205143 |
| 15 | 249795 |
| 16 | 300495 |
| 17 | 357627 |
| 18 | 421575 |
| 19 | 492723 |
| 20 | 571455 |
| 21 | 658155 |
| 22 | 753207 |
| 23 | 856995 |
| 24 | 969903 |
| 25 | 1092315 |
| 26 | 1224615 |
| 27 | 1367187 |
| 28 | 1520415 |
| 29 | 1684683 |
| 30 | 1860375 |
| 31 | 2047875 |
| 32 | 2247567 |
| 33 | 2459835 |