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 | 7 |
| 2 | 61 |
| 3 | 13 |
| 4 | 547 |
| 5 | 73 |
| 6 | 398581 |
| 7 | 1093 |
| 8 | 757 |
| 9 | 23535794707 |
| 10 | 6481 |
| 11 | 797161 |
| 12 | 4561 |
| 13 | 374857981681 |
| 14 | 530713 |
| 15 | 42521761 |
| 16 | 368089 |
| 17 | 82064241848634269407 |
| 18 | 47763361 |
| 19 | 105919308797935444986721 |
| 20 | 2413941289 |
| 21 | 282429005041 |
| 22 | 56495392933101222275861053369 |
| 23 | 150094634909578633 |