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 | 1 |
| 3 | 1 |
| 4 | 156190 |
| 5 | 1 |
| 6 | 1 |
| 7 | 423281535 |
| 8 | 423281535 |
| 9 | 1 |
| 10 | 1 |
| 11 | 473353301060 |
| 12 | 114890380658550 |
| 13 | 473353301060 |
| 14 | 1 |
| 15 | 1 |
| 16 | 382493246941965 |
| 17 | 5119020713873609970 |
| 18 | 5119020713873609970 |
| 19 | 382493246941965 |
| 20 | 1 |
| 21 | 1 |
| 22 | 269025107855605626 |
| 23 | 101955892318210543172751 |
| 24 | 4179647109945703200884716 |
| 25 | 101955892318210543172751 |
| 26 | 269025107855605626 |
| 27 | 1 |