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) |
|---|---|
| 17 | 9 |
| 18 | 48 |
| 19 | 150 |
| 20 | 494 |
| 21 | 1202 |
| 22 | 2542 |
| 23 | 4635 |
| 24 | 9738 |
| 25 | 14943 |
| 26 | 25917 |
| 27 | 41196 |
| 28 | 62518 |
| 29 | 89657 |
| 30 | 139743 |
| 31 | 185114 |
| 32 | 264483 |
| 33 | 363291 |
| 34 | 485411 |
| 35 | 630099 |
| 36 | 862106 |
| 37 | 1067459 |
| 38 | 1391011 |
| 39 | 1771817 |
| 40 | 2210554 |
| 41 | 2712337 |
| 42 | 3461467 |
| 43 | 4115434 |
| 44 | 5073010 |
| 45 | 6165577 |
| 46 | 7387876 |
| 47 | 8748214 |
| 48 | 10655591 |
| 49 | 12333486 |
| 50 | 14679050 |
| 51 | 17281206 |