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 | 21 |
| 2 | 70 |
| 3 | 147 |
| 4 | 252 |
| 5 | 385 |
| 6 | 546 |
| 7 | 735 |
| 8 | 952 |
| 9 | 1197 |
| 10 | 1470 |
| 11 | 1771 |
| 12 | 2100 |
| 13 | 2457 |
| 14 | 2842 |
| 15 | 3255 |
| 16 | 3696 |
| 17 | 4165 |
| 18 | 4662 |
| 19 | 5187 |
| 20 | 5740 |
| 21 | 6321 |
| 22 | 6930 |
| 23 | 7567 |
| 24 | 8232 |
| 25 | 8925 |
| 26 | 9646 |
| 27 | 10395 |
| 28 | 11172 |
| 29 | 11977 |
| 30 | 12810 |
| 31 | 13671 |
| 32 | 14560 |
| 33 | 15477 |
| 34 | 16422 |
| 35 | 17395 |
| 36 | 18396 |
| 37 | 19425 |
| 38 | 20482 |
| 39 | 21567 |
| 40 | 22680 |
| 41 | 23821 |
| 42 | 24990 |