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) |
|---|---|
| 2 | 46 |
| 3 | 239 |
| 4 | 993 |
| 5 | 3927 |
| 6 | 15327 |
| 7 | 59613 |
| 8 | 231733 |
| 9 | 901220 |
| 10 | 3507762 |
| 11 | 13666112 |
| 12 | 53295628 |
| 13 | 208049127 |
| 14 | 812931417 |
| 15 | 3179338857 |
| 16 | 12444969357 |
| 17 | 48753264432 |
| 18 | 191137360902 |
| 19 | 749893379292 |
| 20 | 2944059898632 |
| 21 | 11565629920632 |
| 22 | 45462260000880 |
| 23 | 178803726202404 |