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 | 0 |
| 2 | 0 |
| 3 | 5 |
| 4 | 21 |
| 5 | 71 |
| 6 | 181 |
| 7 | 366 |
| 8 | 585 |
| 9 | 1009 |
| 10 | 1562 |
| 11 | 2312 |
| 12 | 3206 |
| 13 | 4490 |
| 14 | 5967 |
| 15 | 7939 |
| 16 | 10023 |
| 17 | 12913 |
| 18 | 15900 |
| 19 | 19951 |
| 20 | 24153 |
| 21 | 29483 |
| 22 | 35227 |
| 23 | 42039 |
| 24 | 49103 |
| 25 | 57998 |
| 26 | 67518 |
| 27 | 78426 |
| 28 | 90010 |
| 29 | 103631 |
| 30 | 117759 |
| 31 | 134551 |
| 32 | 150970 |
| 33 | 171440 |
| 34 | 192305 |
| 35 | 215740 |
| 36 | 239549 |
| 37 | 268137 |
| 38 | 296993 |
| 39 | 329001 |
| 40 | 361740 |
| 41 | 400113 |