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 | 21 |
| 2 | 105 |
| 3 | 217 |
| 4 | 231 |
| 5 | 315 |
| 6 | 399 |
| 7 | 441 |
| 8 | 483 |
| 9 | 861 |
| 10 | 987 |
| 11 | 1113 |
| 12 | 1197 |
| 13 | 1281 |
| 14 | 1449 |
| 15 | 1491 |
| 16 | 1505 |
| 17 | 1575 |
| 18 | 1715 |
| 19 | 1785 |
| 20 | 1827 |
| 21 | 1869 |
| 22 | 1995 |
| 23 | 2121 |
| 24 | 2191 |
| 25 | 2205 |
| 26 | 2247 |
| 27 | 2303 |
| 28 | 2541 |
| 29 | 2667 |
| 30 | 2709 |
| 31 | 2751 |
| 32 | 2835 |
| 33 | 2933 |
| 34 | 3045 |
| 35 | 3073 |
| 36 | 3129 |
| 37 | 3213 |
| 38 | 3255 |
| 39 | 3353 |
| 40 | 3381 |
| 41 | 3423 |
| 42 | 3465 |
| 43 | 3675 |
| 44 | 3885 |