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 | 4 |
| 2 | 9 |
| 3 | 32 |
| 4 | 121 |
| 5 | 392 |
| 6 | 1352 |
| 7 | 5000 |
| 8 | 18432 |
| 9 | 69192 |
| 10 | 265837 |
| 11 | 1024144 |
| 12 | 3968064 |
| 13 | 15523600 |
| 14 | 60972500 |
| 15 | 240413400 |
| 16 | 950612224 |
| 17 | 3767130288 |
| 18 | 14959246864 |
| 19 | 59495990724 |
| 20 | 236902199076 |
| 21 | 944193944097 |
| 22 | 3765996039168 |
| 23 | 15029799230264 |
| 24 | 60010866324576 |
| 25 | 239700225078125 |
| 26 | 957712290743329 |