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 | 4 |
| 3 | 8 |
| 4 | 21 |
| 5 | 44 |
| 6 | 103 |
| 7 | 217 |
| 8 | 477 |
| 9 | 999 |
| 10 | 2116 |
| 11 | 4373 |
| 12 | 9055 |
| 13 | 18464 |
| 14 | 37576 |
| 15 | 75725 |
| 16 | 152047 |
| 17 | 303158 |
| 18 | 602085 |
| 19 | 1189242 |
| 20 | 2340065 |
| 21 | 4584027 |
| 22 | 8947865 |
| 23 | 17399906 |
| 24 | 33725509 |
| 25 | 65153150 |
| 26 | 125493914 |
| 27 | 241011287 |
| 28 | 461611911 |
| 29 | 881806114 |
| 30 | 1680336592 |
| 31 | 3194346093 |
| 32 | 6058770147 |
| 33 | 11466709780 |