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 | 3 |
| 2 | 13 |
| 3 | 97 |
| 4 | 1153 |
| 5 | 18433 |
| 6 | 331777 |
| 7 | 6635521 |
| 8 | 145981441 |
| 9 | 3795517441 |
| 10 | 136638627841 |
| 11 | 5738822369281 |
| 12 | 252508184248321 |
| 13 | 25250818424832001 |
| 14 | 3030098210979840001 |
| 15 | 375732178161500160001 |
| 16 | 60868612862163025920001 |