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 | 1 |
| 2 | 74 |
| 3 | 3190 |
| 4 | 122188 |
| 5 | 2434670 |
| 6 | 82550864 |
| 7 | 1449655468 |
| 8 | 43551685370 |
| 9 | 745416341496 |
| 10 | 20458460935162 |
| 11 | 350662618941136 |
| 12 | 8977863552693182 |
| 13 | 155527664975367738 |
| 14 | 3769078188330226854 |
| 15 | 66168756974349933990 |
| 16 | 1534449253192384210354 |
| 17 | 27299151102034089996326 |
| 18 | 610935315274446987589872 |