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 | 1 |
| 3 | 0 |
| 4 | 1 |
| 5 | 1 |
| 6 | 2 |
| 7 | 3 |
| 8 | 7 |
| 9 | 12 |
| 10 | 28 |
| 11 | 54 |
| 12 | 127 |
| 13 | 266 |
| 14 | 614 |
| 15 | 1356 |
| 16 | 3134 |
| 17 | 7091 |
| 18 | 16482 |
| 19 | 37929 |
| 20 | 88622 |
| 21 | 206295 |
| 22 | 484445 |
| 23 | 1136897 |
| 24 | 2682451 |
| 25 | 6333249 |
| 26 | 15005945 |
| 27 | 35595805 |
| 28 | 84649515 |
| 29 | 201560350 |
| 30 | 480845007 |
| 31 | 1148537092 |
| 32 | 2747477575 |
| 33 | 6579923491 |
| 34 | 15777658535 |
| 35 | 37871501929 |