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 | 15 |
| 1 | 451 |
| 2 | 13545 |
| 3 | 406801 |
| 4 | 12217575 |
| 5 | 366934051 |
| 6 | 11020239105 |
| 7 | 330974107201 |
| 8 | 9940243455135 |
| 9 | 298538277761251 |
| 10 | 8966088576292665 |
| 11 | 269281195566541201 |
| 12 | 8087401955572528695 |
| 13 | 242891339862742402051 |
| 14 | 7294827597837844590225 |
| 15 | 219087719274998080108801 |