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 | 7 |
| 2 | 37 |
| 3 | 197 |
| 4 | 1049 |
| 5 | 5587 |
| 6 | 29757 |
| 7 | 158491 |
| 8 | 844153 |
| 9 | 4496123 |
| 10 | 23947233 |
| 11 | 127547675 |
| 12 | 679344041 |
| 13 | 3618320227 |
| 14 | 19271886609 |
| 15 | 102645866251 |
| 16 | 546712113769 |
| 17 | 2911896468083 |
| 18 | 15509334488577 |
| 19 | 82605772190267 |
| 20 | 439974623297369 |
| 21 | 2343391557436483 |
| 22 | 12481365289466289 |