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 | 2 |
| 3 | 3 |
| 4 | 5 |
| 5 | 9 |
| 6 | 15 |
| 7 | 26 |
| 8 | 45 |
| 9 | 79 |
| 10 | 135 |
| 11 | 236 |
| 12 | 408 |
| 13 | 710 |
| 14 | 1230 |
| 15 | 2137 |
| 16 | 3705 |
| 17 | 6436 |
| 18 | 11165 |
| 19 | 19384 |
| 20 | 33637 |
| 21 | 58391 |
| 22 | 101336 |
| 23 | 175896 |
| 24 | 305284 |
| 25 | 529884 |
| 26 | 919683 |
| 27 | 1596277 |
| 28 | 2770576 |
| 29 | 4808811 |
| 30 | 8346446 |
| 31 | 14486644 |
| 32 | 25143896 |
| 33 | 43641363 |
| 34 | 75746646 |
| 35 | 131470683 |
| 36 | 228188723 |
| 37 | 396058740 |
| 38 | 687424365 |
| 39 | 1193136983 |
| 40 | 2070883422 |