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 | 1 |
| 3 | 5 |
| 4 | 7 |
| 5 | 25 |
| 6 | 41 |
| 7 | 125 |
| 8 | 225 |
| 9 | 625 |
| 10 | 1195 |
| 11 | 3125 |
| 12 | 6227 |
| 13 | 15625 |
| 14 | 32059 |
| 15 | 78125 |
| 16 | 163727 |
| 17 | 390625 |
| 18 | 831505 |
| 19 | 1953125 |
| 20 | 4206145 |
| 21 | 9765625 |
| 22 | 21215481 |
| 23 | 48828125 |
| 24 | 106782837 |
| 25 | 244140625 |
| 26 | 536618341 |
| 27 | 1220703125 |
| 28 | 2693492305 |
| 29 | 6103515625 |
| 30 | 13507578125 |