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 | 69 |
| 1 | 165 |
| 2 | 726 |
| 3 | 1353 |
| 4 | 4884 |
| 5 | 9768 |
| 6 | 18447 |
| 7 | 92928 |
| 8 | 175857 |
| 9 | 934428 |
| 10 | 1758867 |
| 11 | 9447438 |
| 12 | 17794887 |
| 13 | 96644658 |
| 14 | 182289327 |
| 15 | 906271608 |
| 16 | 1712444217 |
| 17 | 8836886388 |
| 18 | 17673772776 |
| 19 | 85401510447 |
| 20 | 159803020905 |
| 21 | 668823329856 |