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 | 3 |
| 2 | 17 |
| 3 | 13 |
| 4 | 481 |
| 5 | 69 |
| 6 | 1595 |
| 7 | 53 |
| 8 | 64561 |
| 9 | 19333 |
| 10 | -24278897 |
| 11 | -4223787 |
| 12 | 425750784331 |
| 13 | 2082755237 |
| 14 | -759610365139 |
| 15 | -1935668618507 |
| 16 | 91825384919760257 |
| 17 | 3104887811555781 |
| 18 | -333936446105117072383 |
| 19 | -8039608511659164907 |
| 20 | 496858217433153687034811 |
| 21 | 31900258438443561908965 |
| 22 | -1108179772136293880993162549 |
| 23 | -186044136772398390757763787 |
| 24 | 167280081459577193334628789960171 |