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) |
|---|---|
| 3 | 23 |
| 4 | 199 |
| 5 | 2297 |
| 6 | 30013 |
| 7 | 12451 |
| 8 | 9699667 |
| 9 | 79139 |
| 10 | 122069683 |
| 11 | 9241993 |
| 12 | 77184383 |
| 13 | 211941187 |
| 14 | 72280449346243 |
| 15 | 73629553 |
| 16 | 142226610221 |
| 17 | 131076443530861861 |
| 18 | 382046844818915214929 |
| 19 | 1348764323657 |
| 20 | 1822793973448088839487 |
| 21 | 217379667530071 |
| 22 | 3217644767340672907899084554047 |
| 23 | 267064515689275851355624017992701 |