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 | 25 |
| 2 | 625 |
| 3 | 3025 |
| 4 | 9025 |
| 5 | 21025 |
| 6 | 42025 |
| 7 | 75625 |
| 8 | 126025 |
| 9 | 198025 |
| 10 | 297025 |
| 11 | 429025 |
| 12 | 600625 |
| 13 | 819025 |
| 14 | 1092025 |
| 15 | 1428025 |
| 16 | 1836025 |
| 17 | 2325625 |
| 18 | 2907025 |
| 19 | 3591025 |
| 20 | 4389025 |
| 21 | 5313025 |
| 22 | 6375625 |
| 23 | 7590025 |
| 24 | 8970025 |
| 25 | 10530025 |
| 26 | 12285025 |
| 27 | 14250625 |
| 28 | 16443025 |
| 29 | 18879025 |