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 | 3 |
| 2 | 21 |
| 3 | 39 |
| 4 | 165 |
| 5 | 297 |
| 6 | 375 |
| 7 | 417 |
| 8 | 651 |
| 9 | 693 |
| 10 | 1131 |
| 11 | 1887 |
| 12 | 2601 |
| 13 | 3129 |
| 14 | 3147 |
| 15 | 3213 |
| 16 | 3609 |
| 17 | 3783 |
| 18 | 3885 |
| 19 | 4203 |
| 20 | 4455 |
| 21 | 5061 |
| 22 | 6345 |
| 23 | 6969 |
| 24 | 8757 |
| 25 | 10269 |
| 26 | 11067 |
| 27 | 12597 |
| 28 | 13443 |
| 29 | 13899 |
| 30 | 14445 |
| 31 | 15453 |
| 32 | 15939 |
| 33 | 16209 |
| 34 | 16545 |
| 35 | 17763 |
| 36 | 19569 |
| 37 | 19827 |
| 38 | 20223 |
| 39 | 21969 |
| 40 | 23307 |