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) |
|---|---|
| 2 | 3 |
| 3 | 251 |
| 4 | 37 |
| 5 | 5449 |
| 6 | 53 |
| 7 | 2591 |
| 8 | 2538983 |
| 9 | 462191 |
| 10 | 4957 |
| 11 | 5042929 |
| 12 | 151099201553 |
| 13 | 119465070161 |
| 14 | 8868751511 |
| 15 | 56154295334575853 |
| 16 | 4480577578703 |
| 17 | 1254664312327399 |
| 18 | 34237559 |
| 19 | 1683118856778495358491487 |
| 20 | 294307265949353 |
| 21 | 46956374669685791 |
| 22 | 46572151 |
| 23 | 110732345922475922393023393 |