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 | 1 |
| 3 | 0 |
| 4 | 2 |
| 5 | 1 |
| 6 | 4 |
| 7 | 6 |
| 8 | 12 |
| 9 | 17 |
| 10 | 36 |
| 11 | 62 |
| 12 | 118 |
| 13 | 222 |
| 14 | 395 |
| 15 | 773 |
| 16 | 1412 |
| 17 | 2699 |
| 18 | 5100 |
| 19 | 9690 |
| 20 | 18384 |
| 21 | 35074 |
| 22 | 67076 |
| 23 | 128446 |
| 24 | 246483 |
| 25 | 473737 |
| 26 | 911126 |
| 27 | 1757021 |
| 28 | 3390639 |
| 29 | 6551367 |
| 30 | 12675525 |
| 31 | 24545392 |
| 32 | 47584301 |
| 33 | 92330675 |
| 34 | 179318608 |
| 35 | 348546687 |
| 36 | 678022783 |
| 37 | 1319953810 |
| 38 | 2571408262 |