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) |
|---|---|
| 4 | 6569 |
| 5 | 73857 |
| 6 | 818996 |
| 7 | 9082813 |
| 8 | 62254526 |
| 9 | 690413273 |
| 10 | 7656800529 |
| 11 | 84915219092 |
| 12 | 941724210541 |
| 13 | 6454673763134 |
| 14 | 71583428964617 |
| 15 | 793872392373921 |
| 16 | 8804179745077748 |
| 17 | 97639849588229149 |
| 18 | 669233485047004862 |
| 19 | 7421913081219006521 |
| 20 | 82310277378456076593 |
| 21 | 912834964244235849044 |