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 | 2 |
| 4 | 3 |
| 5 | 4 |
| 6 | 5 |
| 7 | 7 |
| 8 | 9 |
| 9 | 12 |
| 10 | 16 |
| 11 | 21 |
| 12 | 27 |
| 13 | 36 |
| 14 | 47 |
| 15 | 62 |
| 16 | 81 |
| 17 | 107 |
| 18 | 140 |
| 19 | 185 |
| 20 | 243 |
| 21 | 320 |
| 22 | 421 |
| 23 | 554 |
| 24 | 729 |
| 25 | 959 |
| 26 | 1263 |
| 27 | 1662 |
| 28 | 2187 |
| 29 | 2878 |
| 30 | 3788 |
| 31 | 4985 |
| 32 | 6561 |
| 33 | 8635 |
| 34 | 11364 |
| 35 | 14956 |
| 36 | 19683 |
| 37 | 25904 |
| 38 | 34092 |
| 39 | 44868 |
| 40 | 59049 |
| 41 | 77713 |