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 | 4536 |
| 4 | 41676 |
| 5 | 324570 |
| 6 | 2298906 |
| 7 | 15340836 |
| 8 | 98401032 |
| 9 | 614180286 |
| 10 | 3759485910 |
| 11 | 22684148388 |
| 12 | 135385868268 |
| 13 | 801141412422 |
| 14 | 4708188092034 |
| 15 | 27512477620020 |
| 16 | 160001531341584 |
| 17 | 926684449543278 |
| 18 | 5347897587948078 |
| 19 | 30765345147232932 |
| 20 | 176489253686952180 |
| 21 | 1009897820473377654 |