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 | 39 |
| 4 | 166 |
| 5 | 677 |
| 6 | 2724 |
| 7 | 10915 |
| 8 | 43682 |
| 9 | 174753 |
| 10 | 699040 |
| 11 | 2796191 |
| 12 | 11184798 |
| 13 | 44739229 |
| 14 | 178956956 |
| 15 | 715827867 |
| 16 | 2863311514 |
| 17 | 11453246105 |
| 18 | 45812984472 |
| 19 | 183251937943 |
| 20 | 733007751830 |
| 21 | 2932031007381 |
| 22 | 11728124029588 |
| 23 | 46912496118419 |