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 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 16 |
| 5 | 31 |
| 6 | 61 |
| 7 | 117 |
| 8 | 228 |
| 9 | 436 |
| 10 | 845 |
| 11 | 1615 |
| 12 | 3120 |
| 13 | 5965 |
| 14 | 11501 |
| 15 | 22001 |
| 16 | 42365 |
| 17 | 81091 |
| 18 | 156010 |
| 19 | 298777 |
| 20 | 574450 |
| 21 | 1100620 |
| 22 | 2115150 |
| 23 | 4053959 |
| 24 | 7788126 |
| 25 | 14931102 |
| 26 | 28676899 |
| 27 | 54990202 |
| 28 | 105594073 |
| 29 | 202519004 |
| 30 | 388825095 |
| 31 | 745825185 |
| 32 | 1431776536 |
| 33 | 2746639052 |