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 | 7 |
| 3 | 1 |
| 4 | 26 |
| 5 | 315 |
| 6 | 1 |
| 7 | 63 |
| 8 | 2600 |
| 9 | 45682 |
| 10 | 1 |
| 11 | 124 |
| 12 | 11655 |
| 13 | 675194 |
| 14 | 15646589 |
| 15 | 1 |
| 16 | 215 |
| 17 | 37944 |
| 18 | 4861458 |
| 19 | 366349152 |
| 20 | 10567689552 |
| 21 | 1 |
| 22 | 342 |
| 23 | 100835 |
| 24 | 23641468 |
| 25 | 3882676581 |
| 26 | 361884843866 |
| 27 | 12503979423607 |
| 28 | 1 |
| 29 | 511 |
| 30 | 232560 |
| 31 | 89076650 |
| 32 | 26387681120 |
| 33 | 5318920238688 |
| 34 | 591934698991168 |
| 35 | 23841011541867520 |