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 | 4 |
| 3 | 30 |
| 4 | 364 |
| 5 | 6233 |
| 6 | 139008 |
| 7 | 3833052 |
| 8 | 126105168 |
| 9 | 4824243516 |
| 10 | 210489178476 |
| 11 | 10318212622770 |
| 12 | 561491367744672 |
| 13 | 33588989930164050 |
| 14 | 2190978413703916624 |
| 15 | 154771816676784778818 |
| 16 | 11771103512077651149912 |
| 17 | 959000166676677798631894 |