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 | 1 |
| 2 | 8 |
| 3 | 36 |
| 4 | 148 |
| 5 | 554 |
| 6 | 2094 |
| 7 | 7624 |
| 8 | 27428 |
| 9 | 96231 |
| 10 | 332159 |
| 11 | 1126792 |
| 12 | 3769418 |
| 13 | 12437966 |
| 14 | 40544836 |
| 15 | 130643734 |
| 16 | 416494314 |
| 17 | 1314512589 |
| 18 | 4110009734 |
| 19 | 12737116845 |
| 20 | 39144344587 |
| 21 | 119350793207 |
| 22 | 361173596536 |
| 23 | 1085171968872 |