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 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 4 |
| 6 | 5 |
| 7 | 51 |
| 8 | 54 |
| 9 | 105 |
| 10 | 306 |
| 11 | 324 |
| 12 | 630 |
| 13 | 2646 |
| 14 | 6711 |
| 15 | 8998 |
| 16 | 9003 |
| 17 | 19847 |
| 18 | 29513 |
| 19 | 30127 |
| 20 | 30132 |
| 21 | 67662 |
| 22 | 71267 |
| 23 | 314751 |
| 24 | 314928 |
| 25 | 405972 |
| 26 | 427602 |
| 27 | 1009394 |
| 28 | 1347704 |
| 29 | 1888506 |
| 30 | 1889568 |
| 31 | 2321838 |
| 32 | 2840097 |
| 33 | 5383299 |
| 34 | 6056364 |
| 35 | 7143622 |
| 36 | 8086224 |
| 37 | 11331036 |
| 38 | 11337408 |
| 39 | 14382561 |