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 | 11 |
| 1 | 112 |
| 2 | 1124 |
| 3 | 11248 |
| 4 | 1124816 |
| 5 | 2486 |
| 6 | 248620 |
| 7 | 4860 |
| 8 | 486018 |
| 9 | 48601827 |
| 10 | 4860182736 |
| 11 | 486018273645 |
| 12 | 8601827365 |
| 13 | 860182736546 |
| 14 | 86018273654656 |
| 15 | 8601827365465667 |
| 16 | 860182736546566780 |
| 17 | 601273654656670 |
| 18 | 60127365465667064 |
| 19 | -1273545704 |
| 20 | -127354570438 |
| 21 | -12735457043849 |
| 22 | -1273545704384962 |
| 23 | -127354570438496270 |
| 24 | 1273545743849627 |
| 25 | 127354574384962777 |
| 26 | 12735457438496277791 |
| 27 | 273545743849627779 |