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 | 5 |
| 5 | 9 |
| 6 | 15 |
| 7 | 25 |
| 8 | 45 |
| 9 | 75 |
| 10 | 125 |
| 11 | 225 |
| 12 | 375 |
| 13 | 625 |
| 14 | 1125 |
| 15 | 1875 |
| 16 | 3125 |
| 17 | 5625 |
| 18 | 9375 |
| 19 | 15625 |
| 20 | 28125 |
| 21 | 46875 |
| 22 | 78125 |
| 23 | 140625 |
| 24 | 234375 |
| 25 | 390625 |
| 26 | 703125 |
| 27 | 1171875 |
| 28 | 1953125 |
| 29 | 3515625 |
| 30 | 5859375 |
| 31 | 9765625 |
| 32 | 17578125 |
| 33 | 29296875 |
| 34 | 48828125 |