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 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 2 |
| 7 | 3 |
| 8 | 5 |
| 9 | 10 |
| 10 | 20 |
| 11 | 42 |
| 12 | 93 |
| 13 | 214 |
| 14 | 516 |
| 15 | 1307 |
| 16 | 3473 |
| 17 | 9659 |
| 18 | 28002 |
| 19 | 84257 |
| 20 | 262229 |
| 21 | 842196 |
| 22 | 2787864 |
| 23 | 9506796 |
| 24 | 33388393 |
| 25 | 120727844 |
| 26 | 449148808 |
| 27 | 1717595949 |
| 28 | 6743420017 |
| 29 | 27147152525 |
| 30 | 111931584098 |
| 31 | 472225684599 |
| 32 | 2037019695797 |
| 33 | 8979468552886 |
| 34 | 40432306870108 |