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 | 1 |
| 1 | 7 |
| 2 | 19 |
| 3 | 51 |
| 4 | 99 |
| 5 | 195 |
| 6 | 291 |
| 7 | 483 |
| 8 | 675 |
| 9 | 963 |
| 10 | 1251 |
| 11 | 1731 |
| 12 | 2115 |
| 13 | 2787 |
| 14 | 3363 |
| 15 | 4131 |
| 16 | 4899 |
| 17 | 6051 |
| 18 | 6915 |
| 19 | 8355 |
| 20 | 9507 |
| 21 | 11043 |
| 22 | 12483 |
| 23 | 14595 |
| 24 | 16131 |
| 25 | 18531 |
| 26 | 20547 |
| 27 | 23139 |
| 28 | 25443 |
| 29 | 28803 |
| 30 | 31107 |
| 31 | 34947 |
| 32 | 38019 |
| 33 | 41859 |
| 34 | 45315 |
| 35 | 49923 |
| 36 | 53379 |
| 37 | 58851 |
| 38 | 63171 |
| 39 | 68547 |