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 | 6 |
| 2 | 66 |
| 3 | 786 |
| 4 | 954 |
| 5 | 1446 |
| 6 | 2142 |
| 7 | 6282 |
| 8 | 9426 |
| 9 | 13158 |
| 10 | 16194 |
| 11 | 16314 |
| 12 | 37470 |
| 13 | 113106 |
| 14 | 1221462 |
| 15 | 1357266 |
| 16 | 1380018 |
| 17 | 2739402 |
| 18 | 3442866 |
| 19 | 16287186 |
| 20 | 39360078 |
| 21 | 72999726 |
| 22 | 138846414 |
| 23 | 175958202 |
| 24 | 195446226 |
| 25 | 228662046 |
| 26 | 319612062 |
| 27 | 355291902 |
| 28 | 1200435786 |