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 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 17 |
| 5 | 1 |
| 6 | 794 |
| 7 | 1 |
| 8 | 65793 |
| 9 | 19684 |
| 10 | 9766650 |
| 11 | 1 |
| 12 | 2194095090 |
| 13 | 1 |
| 14 | 678223089234 |
| 15 | 30531927033 |
| 16 | 281479271743489 |
| 17 | 1 |
| 18 | 150196195641350171 |
| 19 | 1 |
| 20 | 100000096466944316978 |
| 21 | 558545874543637211 |
| 22 | 81402749386839765307626 |
| 23 | 1 |
| 24 | 79501574308536809523296482 |
| 25 | 298023223876953126 |