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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 2 |
| 5 | 1 |
| 6 | 3 |
| 7 | 6 |
| 8 | 12 |
| 9 | 16 |
| 10 | 35 |
| 11 | 63 |
| 12 | 115 |
| 13 | 216 |
| 14 | 399 |
| 15 | 754 |
| 16 | 1418 |
| 17 | 2705 |
| 18 | 5077 |
| 19 | 9667 |
| 20 | 18403 |
| 21 | 35047 |
| 22 | 67045 |
| 23 | 128509 |
| 24 | 246330 |
| 25 | 473457 |
| 26 | 911409 |
| 27 | 1756619 |
| 28 | 3390969 |
| 29 | 6551382 |
| 30 | 12675118 |
| 31 | 24544171 |
| 32 | 47584397 |
| 33 | 92329550 |
| 34 | 179316852 |
| 35 | 348547854 |
| 36 | 678021581 |
| 37 | 1319945483 |
| 38 | 2571395286 |