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 | 1 |
| 2 | 13 |
| 3 | 146 |
| 4 | 1621 |
| 5 | 17836 |
| 6 | 207313 |
| 7 | 2281451 |
| 8 | 25206070 |
| 9 | 277266780 |
| 10 | 34771513601 |
| 11 | 4330564256733 |
| 12 | 535110486286816 |
| 13 | 65858371163036861 |
| 14 | 8202185121837583406 |
| 15 | 1113465620754570813253 |
| 16 | 134741562223525280514741 |
| 17 | 16425841240157671153405780 |