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 | 38 |
| 2 | 696 |
| 3 | 18210 |
| 4 | 390064 |
| 5 | 8134304 |
| 6 | 164351184 |
| 7 | 3258530608 |
| 8 | 63679868768 |
| 9 | 1230707111424 |
| 10 | 23573013881888 |
| 11 | 448188039743360 |
| 12 | 8468276406290880 |
| 13 | 159151109503787520 |
| 14 | 2977237536021550208 |
| 15 | 55469798154343791232 |