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 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 4 |
| 6 | 7 |
| 7 | 14 |
| 8 | 27 |
| 9 | 52 |
| 10 | 102 |
| 11 | 198 |
| 12 | 387 |
| 13 | 755 |
| 14 | 1474 |
| 15 | 2879 |
| 16 | 5622 |
| 17 | 10982 |
| 18 | 21450 |
| 19 | 41900 |
| 20 | 81847 |
| 21 | 159880 |
| 22 | 312315 |
| 23 | 610086 |
| 24 | 1191768 |
| 25 | 2328054 |
| 26 | 4547732 |
| 27 | 8883767 |
| 28 | 17354001 |
| 29 | 33900200 |
| 30 | 66222412 |
| 31 | 129362318 |
| 32 | 252703135 |
| 33 | 493643580 |
| 34 | 964309346 |