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 | 0 |
| 1 | 20 |
| 2 | 49 |
| 3 | 99 |
| 4 | 165 |
| 5 | 247 |
| 6 | 345 |
| 7 | 459 |
| 8 | 589 |
| 9 | 735 |
| 10 | 897 |
| 11 | 1075 |
| 12 | 1269 |
| 13 | 1479 |
| 14 | 1705 |
| 15 | 1947 |
| 16 | 2205 |
| 17 | 2479 |
| 18 | 2769 |
| 19 | 3075 |
| 20 | 3397 |
| 21 | 3735 |
| 22 | 4089 |
| 23 | 4459 |
| 24 | 4845 |
| 25 | 5247 |
| 26 | 5665 |
| 27 | 6099 |
| 28 | 6549 |
| 29 | 7015 |
| 30 | 7497 |
| 31 | 7995 |
| 32 | 8509 |
| 33 | 9039 |
| 34 | 9585 |
| 35 | 10147 |
| 36 | 10725 |
| 37 | 11319 |
| 38 | 11929 |
| 39 | 12555 |