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 | 2 |
| 3 | 3 |
| 4 | 5 |
| 5 | 8 |
| 6 | 14 |
| 7 | 25 |
| 8 | 46 |
| 9 | 87 |
| 10 | 167 |
| 11 | 324 |
| 12 | 634 |
| 13 | 1248 |
| 14 | 2466 |
| 15 | 4887 |
| 16 | 9706 |
| 17 | 19308 |
| 18 | 38455 |
| 19 | 76659 |
| 20 | 152925 |
| 21 | 305232 |
| 22 | 609488 |
| 23 | 1217429 |
| 24 | 2432399 |
| 25 | 4860881 |
| 26 | 9715511 |
| 27 | 19421029 |
| 28 | 38826059 |
| 29 | 77626471 |
| 30 | 155211785 |
| 31 | 310357462 |
| 32 | 620608652 |
| 33 | 1241046343 |
| 34 | 2481817484 |
| 35 | 4963191718 |
| 36 | 9925669171 |
| 37 | 19850186856 |
| 38 | 39698516655 |
| 39 | 79394037319 |