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 | 4 |
| 3 | 9 |
| 4 | 25 |
| 5 | 66 |
| 6 | 297 |
| 7 | 1562 |
| 8 | 10901 |
| 9 | 88238 |
| 10 | 806174 |
| 11 | 8037887 |
| 12 | 86228020 |
| 13 | 985884104 |
| 14 | 11946634677 |
| 15 | 152808994328 |
| 16 | 2056701656260 |