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 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 8 |
| 5 | 5 |
| 6 | 30 |
| 7 | 7 |
| 8 | 104 |
| 9 | 36 |
| 10 | 330 |
| 11 | 11 |
| 12 | 1296 |
| 13 | 13 |
| 14 | 2702 |
| 15 | 2445 |
| 16 | 7440 |
| 17 | 17 |
| 18 | 33030 |
| 19 | 19 |
| 20 | 51220 |
| 21 | 76566 |
| 22 | 112662 |
| 23 | 23 |
| 24 | 699216 |
| 25 | 3150 |
| 26 | 639002 |
| 27 | 1653399 |
| 28 | 2064412 |
| 29 | 29 |
| 30 | 10620300 |
| 31 | 31 |
| 32 | 12451872 |
| 33 | 29229288 |
| 34 | 17825826 |
| 35 | 1640660 |
| 36 | 190101888 |
| 37 | 37 |
| 38 | 89653286 |
| 39 | 455976417 |
| 40 | 441305440 |
| 41 | 41 |