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 | 5 |
| 2 | 3 |
| 3 | 23 |
| 4 | 15 |
| 5 | 95 |
| 6 | 575 |
| 7 | 383 |
| 8 | 255 |
| 9 | 5631 |
| 10 | 25599 |
| 11 | 104447 |
| 12 | 69631 |
| 13 | 745471 |
| 14 | 3293183 |
| 15 | 2195455 |
| 16 | 12648447 |
| 17 | 97910783 |
| 18 | 65273855 |
| 19 | 43515903 |
| 20 | 1460666367 |
| 21 | 6700400639 |
| 22 | 4466933759 |
| 23 | 71697432575 |
| 24 | 47798288383 |
| 25 | 764873277439 |
| 26 | 1242923270143 |
| 27 | 3760646520831 |
| 28 | 8371159695359 |
| 29 | 5580773130239 |
| 30 | 3720515420159 |