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 | 6 |
| 2 | 51 |
| 3 | 376 |
| 4 | 2501 |
| 5 | 15626 |
| 6 | 93751 |
| 7 | 546876 |
| 8 | 3125001 |
| 9 | 17578126 |
| 10 | 97656251 |
| 11 | 537109376 |
| 12 | 2929687501 |
| 13 | 15869140626 |
| 14 | 85449218751 |
| 15 | 457763671876 |
| 16 | 2441406250001 |
| 17 | 12969970703126 |
| 18 | 68664550781251 |
| 19 | 362396240234376 |
| 20 | 1907348632812501 |
| 21 | 10013580322265626 |
| 22 | 52452087402343751 |