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 | 4 |
| 2 | 64 |
| 3 | 484 |
| 4 | 8464 |
| 5 | 68644 |
| 6 | 8868484 |
| 7 | 66686864644 |
| 8 | 648446888644 |
| 9 | 84488488664644 |
| 10 | 6688684484846884 |
| 11 | 484468468684686864 |
| 12 | 6486486884468464644 |
| 13 | 8666684686666444646464 |
| 14 | 6868846444484868668464644 |
| 15 | 686666466846666884868486448488884846884 |