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) |
|---|---|
| 2 | 3 |
| 3 | 9 |
| 4 | 24 |
| 5 | 51 |
| 6 | 102 |
| 7 | 177 |
| 8 | 294 |
| 9 | 459 |
| 10 | 690 |
| 11 | 987 |
| 12 | 1380 |
| 13 | 1875 |
| 14 | 2508 |
| 15 | 3279 |
| 16 | 4212 |
| 17 | 5319 |
| 18 | 6648 |
| 19 | 8199 |
| 20 | 10026 |
| 21 | 12141 |
| 22 | 14580 |
| 23 | 17343 |
| 24 | 20496 |
| 25 | 24051 |
| 26 | 28068 |
| 27 | 32547 |
| 28 | 37542 |
| 29 | 43071 |
| 30 | 49218 |
| 31 | 55983 |
| 32 | 63456 |
| 33 | 71661 |
| 34 | 80658 |
| 35 | 90447 |
| 36 | 101100 |
| 37 | 112635 |
| 38 | 125160 |
| 39 | 138675 |
| 40 | 153252 |
| 41 | 168915 |
| 42 | 185784 |