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 | 665857 |
| 2 | 7380481 |
| 3 | 708158977 |
| 4 | 325142092801 |
| 5 | 1401864610177 |
| 6 | 2161873163521 |
| 7 | 448940843963137 |
| 8 | 1494471913541377 |
| 9 | 2563669662007681 |
| 10 | 3045085994259457 |
| 11 | 27932995018647937 |
| 12 | 115054894682275201 |
| 13 | 128098973812320001 |