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 | 33 |
| 3 | 496 |
| 4 | 8610 |
| 5 | 162435 |
| 6 | 3235501 |
| 7 | 66959532 |
| 8 | 1425658806 |
| 9 | 31026962395 |
| 10 | 687124547340 |
| 11 | 15434728080408 |
| 12 | 350818684083868 |
| 13 | 8053515040969200 |
| 14 | 186457795206547635 |
| 15 | 4348790005989493960 |
| 16 | 102080931442008205230 |
| 17 | 2409777235191897422982 |