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 | 1 |
| 2 | 3 |
| 3 | 4 |
| 4 | 59 |
| 5 | 63 |
| 6 | 185 |
| 7 | 248 |
| 8 | 3657 |
| 9 | 3905 |
| 10 | 11467 |
| 11 | 15372 |
| 12 | 226675 |
| 13 | 242047 |
| 14 | 710769 |
| 15 | 952816 |
| 16 | 14050193 |
| 17 | 15003009 |
| 18 | 44056211 |
| 19 | 59059220 |
| 20 | 870885291 |
| 21 | 929944511 |
| 22 | 2730774313 |
| 23 | 3660718824 |
| 24 | 53980837849 |
| 25 | 57641556673 |
| 26 | 169263951195 |
| 27 | 226905507868 |
| 28 | 3345941061347 |
| 29 | 3572846569215 |