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 | 2 |
| 3 | 17 |
| 4 | 34 |
| 5 | 4097 |
| 6 | 146 |
| 7 | 1679617 |
| 8 | 262178 |
| 9 | 60466193 |
| 10 | 4198402 |
| 11 | 1000000000001 |
| 12 | 67109042 |
| 13 | 1283918464548865 |
| 14 | 470186664194 |
| 15 | 281474976714769 |
| 16 | 2251799813947426 |
| 17 | 4722366482869645213697 |
| 18 | 609359800476818 |
| 19 | 12748236216396078174437377 |
| 20 | 9223372036858974242 |