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 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 5 |
| 7 | 8 |
| 8 | 14 |
| 9 | 24 |
| 10 | 42 |
| 11 | 72 |
| 12 | 127 |
| 13 | 221 |
| 14 | 390 |
| 15 | 684 |
| 16 | 1207 |
| 17 | 2125 |
| 18 | 3753 |
| 19 | 6620 |
| 20 | 11698 |
| 21 | 20659 |
| 22 | 36518 |
| 23 | 64533 |
| 24 | 114099 |
| 25 | 201707 |
| 26 | 356683 |
| 27 | 630693 |
| 28 | 1115370 |
| 29 | 1972469 |
| 30 | 3488489 |
| 31 | 6169656 |
| 32 | 10912003 |
| 33 | 19299555 |
| 34 | 34135099 |
| 35 | 60374747 |
| 36 | 106786342 |
| 37 | 188875933 |
| 38 | 334072759 |
| 39 | 590889162 |
| 40 | 1045136443 |