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) |
|---|---|
| 3 | 1 |
| 4 | 1 |
| 5 | 29 |
| 6 | 1 |
| 7 | 103 |
| 8 | 253 |
| 9 | 1669 |
| 10 | 181 |
| 11 | 30791 |
| 12 | 849 |
| 13 | 452993 |
| 14 | 41003 |
| 15 | 94949 |
| 16 | 421117 |
| 17 | 18358463 |
| 18 | 446801 |
| 19 | 124184839 |
| 20 | 30064511 |
| 21 | 80932487 |
| 22 | 19812817 |
| 23 | 211524139 |
| 24 | 333707681 |
| 25 | 4757207109 |
| 26 | 2557825027 |
| 27 | 105920383973 |
| 28 | 14417396537 |
| 29 | 4649180818987 |