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 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 1 |
| 10 | 8 |
| 11 | 43 |
| 12 | 188 |
| 13 | 728 |
| 14 | 2593 |
| 15 | 8706 |
| 16 | 27961 |
| 17 | 86802 |
| 18 | 262348 |
| 19 | 776126 |
| 20 | 2256418 |
| 21 | 6466614 |
| 22 | 18311915 |
| 23 | 51334232 |
| 24 | 142673720 |
| 25 | 393611872 |
| 26 | 1078955836 |
| 27 | 2941029334 |
| 28 | 7977065816 |
| 29 | 21541492856 |
| 30 | 57942770689 |
| 31 | 155304829763 |
| 32 | 414934057486 |