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 | 28 |
| 2 | 784 |
| 3 | 21952 |
| 4 | 451278 |
| 5 | 9116396 |
| 6 | 163879101 |
| 7 | 2818160392 |
| 8 | 45839624169 |
| 9 | 718310821738 |
| 10 | 10874476927778 |
| 11 | 160107985766626 |
| 12 | 2300536065892988 |
| 13 | 32371741678239290 |
| 14 | 447233651315427782 |
| 15 | 6079896218958203376 |