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 | 12 |
| 2 | 342 |
| 3 | 4665 |
| 4 | 70462 |
| 5 | 1031105 |
| 6 | 15000701 |
| 7 | 219937967 |
| 8 | 3222629836 |
| 9 | 47159743290 |
| 10 | 690399979855 |
| 11 | 10108622083346 |
| 12 | 147993608472149 |
| 13 | 2166661772771563 |
| 14 | 31720960292577983 |
| 15 | 464409247083163776 |
| 16 | 6799146031063407846 |