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 | 243 |
| 2 | 1523 |
| 3 | 72257 |
| 4 | 1602741 |
| 5 | 48942485 |
| 6 | 1368783313 |
| 7 | 40300213599 |
| 8 | 1170265289539 |
| 9 | 34202123230555 |
| 10 | 997730409895429 |
| 11 | 29128167430767449 |
| 12 | 850254151548959837 |
| 13 | 24820794901995097417 |
| 14 | 724574515854245379961 |
| 15 | 21151965211624408172993 |