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) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 6 |
| 5 | 12 |
| 6 | 22 |
| 7 | 44 |
| 8 | 84 |
| 9 | 163 |
| 10 | 314 |
| 11 | 610 |
| 12 | 1184 |
| 13 | 2308 |
| 14 | 4505 |
| 15 | 8843 |
| 16 | 17386 |
| 17 | 34336 |
| 18 | 67881 |
| 19 | 134662 |
| 20 | 267431 |
| 21 | 532172 |
| 22 | 1060048 |
| 23 | 2113947 |
| 24 | 4218325 |
| 25 | 8423138 |
| 26 | 16826162 |
| 27 | 33623311 |
| 28 | 67205646 |
| 29 | 134351795 |
| 30 | 268621562 |
| 31 | 537124814 |
| 32 | 1074092608 |
| 33 | 2147953084 |
| 34 | 4295613139 |
| 35 | 8590784715 |
| 36 | 17181035797 |
| 37 | 34361248692 |
| 38 | 68721546255 |
| 39 | 137441586921 |
| 40 | 274881519876 |
| 41 | 549760320576 |
| 42 | 1099517861045 |
| 43 | 2199030848627 |
| 44 | 4398057100987 |
| 45 | 8796105652038 |
| 46 | 17592203866158 |