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 | 3 |
| 3 | 4 |
| 4 | 13 |
| 5 | 6 |
| 6 | 120 |
| 7 | 8 |
| 8 | 1161 |
| 9 | 2197 |
| 10 | 16148 |
| 11 | 12 |
| 12 | 603190 |
| 13 | 14 |
| 14 | 5773008 |
| 15 | 50422464 |
| 16 | 201359377 |
| 17 | 18 |
| 18 | 16590656229 |
| 19 | 20 |
| 20 | 269768284118 |
| 21 | 4748723771432 |
| 22 | 3138430473896 |
| 23 | 24 |
| 24 | 2972582195034162 |
| 25 | 476837158203151 |
| 26 | 3937376419253748 |
| 27 | 1350852564961601560 |
| 28 | 4066515044181860654 |
| 29 | 30 |
| 30 | 1036488835382356683530 |
| 31 | 32 |