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) |
|---|---|
| 3 | 21 |
| 4 | 169 |
| 5 | 117 |
| 6 | 190 |
| 7 | 1404 |
| 8 | 9976 |
| 9 | 3961 |
| 10 | 11935 |
| 11 | 19966 |
| 12 | 113401 |
| 13 | 98155 |
| 14 | 208879 |
| 15 | 261501 |
| 16 | 3338221 |
| 17 | 916475 |
| 18 | 3100671 |
| 19 | 9943039 |
| 20 | 31457140 |
| 21 | 50322871 |
| 22 | 100523871 |
| 23 | 264240373 |
| 24 | 2113871829 |
| 25 | 2012739435 |
| 26 | 532673535 |
| 27 | 7415513007 |
| 28 | 33017544153 |
| 29 | 17112759966 |
| 30 | 50983861215 |
| 31 | 59039022015 |