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 | 71 |
| 2 | 2143 |
| 3 | 54335 |
| 4 | 1321471 |
| 5 | 31817471 |
| 6 | 764217343 |
| 7 | 18344733695 |
| 8 | 440294408191 |
| 9 | 10567189327871 |
| 10 | 253613279903743 |
| 11 | 6086723113107455 |
| 12 | 146081381003558911 |
| 13 | 3505953301484470271 |
| 14 | 84142880178680889343 |
| 15 | 2019429129941297135615 |
| 16 | 48466299152487396933631 |