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 | 1 |
| 2 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 4 |
| 6 | 3 |
| 7 | 14 |
| 8 | 13 |
| 9 | 50 |
| 10 | 47 |
| 11 | 202 |
| 12 | 197 |
| 13 | 876 |
| 14 | 862 |
| 15 | 4134 |
| 16 | 4125 |
| 17 | 21146 |
| 18 | 21092 |
| 19 | 115974 |
| 20 | 115922 |
| 21 | 678554 |
| 22 | 678367 |
| 23 | 4213596 |
| 24 | 4213381 |
| 25 | 27644432 |
| 26 | 27643560 |
| 27 | 190899270 |
| 28 | 190898444 |
| 29 | 1382958544 |
| 30 | 1382954355 |
| 31 | 10480142146 |
| 32 | 10480138007 |
| 33 | 82864869600 |
| 34 | 82864848657 |