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 | 6 |
| 2 | 18 |
| 3 | 32 |
| 4 | 58 |
| 5 | 112 |
| 6 | 220 |
| 7 | 450 |
| 8 | 938 |
| 9 | 1982 |
| 10 | 4220 |
| 11 | 9022 |
| 12 | 19332 |
| 13 | 41472 |
| 14 | 89022 |
| 15 | 191150 |
| 16 | 410506 |
| 17 | 881656 |
| 18 | 1893634 |
| 19 | 4067256 |
| 20 | 8735972 |
| 21 | 18763898 |
| 22 | 40302866 |
| 23 | 86566390 |
| 24 | 185935764 |
| 25 | 399371142 |
| 26 | 857808780 |
| 27 | 1842486536 |
| 28 | 3957474934 |
| 29 | 8500256470 |
| 30 | 18257692546 |
| 31 | 39215680080 |
| 32 | 84231321290 |
| 33 | 180920373632 |
| 34 | 388598695916 |