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) |
---|---|
11 | 1 |
12 | -90909090909 |
13 | 9182736455455463728191 |
14 | -917356289256280909173471073462809 |
15 | 91744803405968779530929125886960513398447191 |
16 | -9174388596710909926545613072877527255280907421320652809 |