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 | 9 |
| 3 | 27 |
| 4 | 66 |
| 5 | 144 |
| 6 | 253 |
| 7 | 424 |
| 8 | 651 |
| 9 | 977 |
| 10 | 1392 |
| 11 | 1866 |
| 12 | 2479 |
| 13 | 3169 |
| 14 | 3981 |
| 15 | 4978 |
| 16 | 6137 |
| 17 | 7420 |
| 18 | 8829 |
| 19 | 10477 |
| 20 | 12279 |
| 21 | 14295 |
| 22 | 16613 |
| 23 | 19124 |
| 24 | 21906 |
| 25 | 24904 |
| 26 | 28056 |
| 27 | 31494 |
| 28 | 35320 |
| 29 | 39486 |
| 30 | 44102 |
| 31 | 49116 |
| 32 | 54103 |
| 33 | 59468 |
| 34 | 65143 |
| 35 | 71315 |
| 36 | 77649 |
| 37 | 84504 |
| 38 | 91720 |
| 39 | 99303 |
| 40 | 107365 |