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 | 72 |
| 3 | 70 |
| 4 | 714 |
| 5 | 7140 |
| 6 | 71610 |
| 7 | 746130 |
| 8 | 70136220 |
| 9 | 703600590 |
| 10 | 70015935990 |
| 11 | 700288518930 |
| 12 | 7420738134810 |
| 13 | 701098433345310 |
| 14 | 70007243563797540 |
| 15 | 757887406446280110 |
| 16 | 70025936403159126390 |
| 17 | 7001749954335151685670 |
| 18 | 700007496840185797172910 |