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 | 1 |
| 1 | 7 |
| 2 | 91 |
| 3 | 1330 |
| 4 | 20475 |
| 5 | 324632 |
| 6 | 5245786 |
| 7 | 85900584 |
| 8 | 1420494075 |
| 9 | 23667689815 |
| 10 | 396704524216 |
| 11 | 6681687099710 |
| 12 | 112992892764570 |
| 13 | 1917283000904460 |
| 14 | 32626924340528840 |
| 15 | 556608279578340080 |
| 16 | 9516306085765295355 |
| 17 | 163011740982048945441 |