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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 61 |
| 8 | 1 |
| 9 | 277 |
| 10 | 1 |
| 11 | 19 |
| 12 | 691 |
| 13 | 43 |
| 14 | 1 |
| 15 | 47 |
| 16 | 3617 |
| 17 | 228135437 |
| 18 | 43867 |
| 19 | 79 |
| 20 | 283 |
| 21 | 41737 |
| 22 | 131 |
| 23 | 31 |
| 24 | 103 |
| 25 | 2137 |
| 26 | 657931 |
| 27 | 67 |
| 28 | 9349 |
| 29 | 71 |
| 30 | 1721 |
| 31 | 15669721 |
| 32 | 37 |
| 33 | 930157 |
| 34 | 151628697551 |
| 35 | 4153 |
| 36 | 26315271553053477373 |
| 37 | 9257 |
| 38 | 154210205991661 |
| 39 | 23489580527043108252017828576198947741 |
| 40 | 137616929 |
| 41 | 763601 |