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 | 15 |
| 2 | 63 |
| 3 | 147 |
| 4 | 171 |
| 5 | 207 |
| 6 | 627 |
| 7 | 663 |
| 8 | 1023 |
| 9 | 1647 |
| 10 | 1971 |
| 11 | 2975 |
| 12 | 6399 |
| 13 | 18063 |
| 14 | 19359 |
| 15 | 27639 |
| 16 | 40215 |
| 17 | 48895 |
| 18 | 58563 |
| 19 | 78819 |
| 20 | 95511 |
| 21 | 114231 |
| 22 | 133595 |
| 23 | 134871 |
| 24 | 145915 |
| 25 | 147455 |
| 26 | 163539 |
| 27 | 168507 |
| 28 | 172287 |
| 29 | 188067 |
| 30 | 529983 |
| 31 | 680859 |
| 32 | 795639 |
| 33 | 1207359 |
| 34 | 1238571 |
| 35 | 1553499 |
| 36 | 1588491 |
| 37 | 2049219 |