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 | 9 |
| 2 | 21 |
| 3 | 36 |
| 4 | 54 |
| 5 | 75 |
| 6 | 99 |
| 7 | 126 |
| 8 | 156 |
| 9 | 189 |
| 10 | 225 |
| 11 | 264 |
| 12 | 306 |
| 13 | 351 |
| 14 | 399 |
| 15 | 450 |
| 16 | 504 |
| 17 | 561 |
| 18 | 621 |
| 19 | 684 |
| 20 | 750 |
| 21 | 819 |
| 22 | 891 |
| 23 | 966 |
| 24 | 1044 |
| 25 | 1125 |
| 26 | 1209 |
| 27 | 1296 |
| 28 | 1386 |
| 29 | 1479 |
| 30 | 1575 |
| 31 | 1674 |
| 32 | 1776 |
| 33 | 1881 |
| 34 | 1989 |
| 35 | 2100 |
| 36 | 2214 |
| 37 | 2331 |
| 38 | 2451 |
| 39 | 2574 |
| 40 | 2700 |
| 41 | 2829 |
| 42 | 2961 |
| 43 | 3096 |