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 | 1 |
| 2 | 665 |
| 3 | 106819 |
| 4 | 10365005 |
| 5 | 805351531 |
| 6 | 56294206205 |
| 7 | 3735873535339 |
| 8 | 241600284318365 |
| 9 | 15423235216318411 |
| 10 | 978180744322139645 |
| 11 | 61834480769377286059 |
| 12 | 3902270609960140639325 |
| 13 | 246057483524862034206091 |
| 14 | 15508484277325946034039485 |
| 15 | 977254123876968508188975979 |