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 | 5 |
| 2 | 25 |
| 3 | 115 |
| 4 | 125 |
| 5 | 551 |
| 6 | 625 |
| 7 | 2551 |
| 8 | 2885 |
| 9 | 3049 |
| 10 | 3125 |
| 11 | 15575 |
| 12 | 15625 |
| 13 | 72115 |
| 14 | 78125 |
| 15 | 303551 |
| 16 | 390625 |
| 17 | 1461799 |
| 18 | 1790635 |
| 19 | 1802885 |
| 20 | 1847551 |
| 21 | 1857449 |
| 22 | 1946801 |
| 23 | 1952875 |
| 24 | 1953125 |
| 25 | 8053505 |
| 26 | 8468945 |
| 27 | 9734425 |
| 28 | 9765625 |
| 29 | 36631645 |
| 30 | 43890449 |
| 31 | 45072115 |
| 32 | 48828125 |
| 33 | 215049449 |
| 34 | 215418199 |