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 | 6434041 |
| 2 | 89002225 |
| 3 | 865125625 |
| 4 | 89610625 |
| 5 | 353440516 |
| 6 | 29160156025 |
| 7 | 18989880481 |
| 8 | 37434450625 |
| 9 | 72399370000 |
| 10 | 444515646025 |
| 11 | 346008660625 |
| 12 | 2003915162500 |
| 13 | 9475360381201 |
| 14 | 166729268761 |
| 15 | 13110591519025 |
| 16 | 8007417968121 |
| 17 | 11201866562500 |
| 18 | 3095696620900 |
| 19 | 61956758281561 |