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 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 4 |
| 6 | 8 |
| 7 | 16 |
| 8 | 37 |
| 9 | 97 |
| 10 | 275 |
| 11 | 810 |
| 12 | 2468 |
| 13 | 7840 |
| 14 | 26182 |
| 15 | 92047 |
| 16 | 339029 |
| 17 | 1299185 |
| 18 | 5152244 |
| 19 | 21091816 |
| 20 | 89087652 |
| 21 | 388318264 |
| 22 | 1746324563 |
| 23 | 8094422821 |
| 24 | 38608318847 |
| 25 | 189179752492 |
| 26 | 950930369320 |
| 27 | 4898477508796 |
| 28 | 25841317224002 |
| 29 | 139534769647745 |
| 30 | 770795537345237 |
| 31 | 4353368099507329 |