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 | 4 |
| 5 | 9 |
| 6 | 17 |
| 7 | 38 |
| 8 | 89 |
| 9 | 213 |
| 10 | 480 |
| 11 | 1151 |
| 12 | 2810 |
| 13 | 6978 |
| 14 | 16497 |
| 15 | 40731 |
| 16 | 101680 |
| 17 | 256491 |
| 18 | 623916 |
| 19 | 1568966 |
| 20 | 3972773 |
| 21 | 10130647 |
| 22 | 25044032 |
| 23 | 63573638 |
| 24 | 162478685 |
| 25 | 417322917 |
| 26 | 1049096179 |
| 27 | 2687278965 |
| 28 | 6917001254 |
| 29 | 17882746627 |
| 30 | 45391766669 |
| 31 | 116995255065 |
| 32 | 302689722551 |