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 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 6 |
| 6 | 11 |
| 7 | 22 |
| 8 | 44 |
| 9 | 90 |
| 10 | 187 |
| 11 | 392 |
| 12 | 832 |
| 13 | 1778 |
| 14 | 3831 |
| 15 | 8304 |
| 16 | 18104 |
| 17 | 39666 |
| 18 | 87296 |
| 19 | 192896 |
| 20 | 427778 |
| 21 | 951808 |
| 22 | 2124135 |
| 23 | 4753476 |
| 24 | 10664458 |
| 25 | 23981698 |
| 26 | 54045448 |
| 27 | 122041844 |
| 28 | 276101386 |
| 29 | 625725936 |
| 30 | 1420386363 |
| 31 | 3229171828 |
| 32 | 7351869690 |
| 33 | 16760603722 |
| 34 | 38258956928 |
| 35 | 87437436916 |
| 36 | 200057233386 |
| 37 | 458223768512 |
| 38 | 1050614664580 |