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 | 10 |
| 2 | 235 |
| 3 | 7291 |
| 4 | 252316 |
| 5 | 9270325 |
| 6 | 353892421 |
| 7 | 13874930821 |
| 8 | 554792522662 |
| 9 | 22521121103287 |
| 10 | 925224047453512 |
| 11 | 38381686035811912 |
| 12 | 1605078750713101912 |
| 13 | 67578873844051699048 |
| 14 | 2861782692234129345448 |
| 15 | 121795323921169907086504 |