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 | 0 |
| 1 | 1 |
| 2 | 3 |
| 3 | 4 |
| 4 | 7 |
| 5 | 13 |
| 6 | 24 |
| 7 | 44 |
| 8 | 81 |
| 9 | 149 |
| 10 | 274 |
| 11 | 504 |
| 12 | 927 |
| 13 | 1705 |
| 14 | 3136 |
| 15 | 5768 |
| 16 | 10609 |
| 17 | 19513 |
| 18 | 35890 |
| 19 | 66012 |
| 20 | 121415 |
| 21 | 223317 |
| 22 | 410744 |
| 23 | 755476 |
| 24 | 1389537 |
| 25 | 2555757 |
| 26 | 4700770 |
| 27 | 8646064 |
| 28 | 15902591 |
| 29 | 29249425 |
| 30 | 53798080 |
| 31 | 98950096 |
| 32 | 181997601 |
| 33 | 334745777 |
| 34 | 615693474 |