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 | 30 |
| 4 | 63 |
| 5 | 165 |
| 6 | 234 |
| 7 | 408 |
| 8 | 513 |
| 9 | 759 |
| 10 | 1218 |
| 11 | 1395 |
| 12 | 1998 |
| 13 | 2460 |
| 14 | 2709 |
| 15 | 3243 |
| 16 | 4134 |
| 17 | 5133 |
| 18 | 5490 |
| 19 | 6633 |
| 20 | 7455 |
| 21 | 7884 |
| 22 | 9243 |
| 23 | 10209 |
| 24 | 11748 |
| 25 | 13968 |
| 26 | 15150 |
| 27 | 15759 |
| 28 | 17013 |
| 29 | 17658 |
| 30 | 18984 |
| 31 | 24003 |
| 32 | 25545 |
| 33 | 27948 |
| 34 | 28773 |
| 35 | 33078 |
| 36 | 33975 |
| 37 | 36738 |
| 38 | 39609 |
| 39 | 41583 |
| 40 | 44634 |