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) |
|---|---|
| 0 | 4 |
| 1 | 14 |
| 2 | 194 |
| 3 | 37634 |
| 4 | 1416317954 |
| 5 | 669670838 |
| 6 | 1937259419 |
| 7 | 425413602 |
| 8 | 842014276 |
| 9 | 12692426 |
| 10 | 2044502122 |
| 11 | 1119438707 |
| 12 | 1190075270 |
| 13 | 1450757861 |
| 14 | 877666528 |
| 15 | 630853853 |
| 16 | 940321271 |
| 17 | 512995887 |
| 18 | 692931217 |
| 19 | 1883625615 |
| 20 | 1992425718 |