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 | 7 |
| 2 | 71 |
| 3 | 281 |
| 4 | 4523 |
| 5 | 74713 |
| 6 | 904523 |
| 7 | 6028747 |
| 8 | 72407663 |
| 9 | 360287471 |
| 10 | 7427466391 |
| 11 | 75724709369 |
| 12 | 749669676277 |
| 13 | 8284590452353 |
| 14 | 99959574966967 |
| 15 | 724709369995957 |
| 16 | 2470936999595749 |
| 17 | 28459045235360287 |
| 18 | 571382178525166427 |