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 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 2 |
| 6 | 3 |
| 7 | 6 |
| 8 | 10 |
| 9 | 21 |
| 10 | 41 |
| 11 | 87 |
| 12 | 187 |
| 13 | 423 |
| 14 | 971 |
| 15 | 2324 |
| 16 | 5668 |
| 17 | 14224 |
| 18 | 36506 |
| 19 | 95880 |
| 20 | 257081 |
| 21 | 703616 |
| 22 | 1962887 |
| 23 | 5578529 |
| 24 | 16137942 |
| 25 | 47492141 |
| 26 | 142093854 |
| 27 | 432001458 |
| 28 | 1333937382 |
| 29 | 4181500703 |
| 30 | 13301265585 |
| 31 | 42918900353 |
| 32 | 140423545125 |
| 33 | 465712099790 |
| 34 | 1565092655597 |