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 | 1 |
| 2 | 3 |
| 3 | 15 |
| 4 | 57 |
| 5 | 147 |
| 6 | 2085 |
| 7 | 6687 |
| 8 | 6957 |
| 9 | 11055 |
| 10 | 15267 |
| 11 | 17385 |
| 12 | 17577 |
| 13 | 20505 |
| 14 | 20637 |
| 15 | 23667 |
| 16 | 26247 |
| 17 | 31077 |
| 18 | 31317 |
| 19 | 32115 |
| 20 | 32967 |
| 21 | 34497 |
| 22 | 39225 |
| 23 | 47775 |
| 24 | 52065 |
| 25 | 53715 |
| 26 | 55335 |
| 27 | 56205 |
| 28 | 58365 |
| 29 | 62187 |
| 30 | 63585 |
| 31 | 66567 |
| 32 | 67215 |
| 33 | 70875 |
| 34 | 77235 |
| 35 | 77475 |
| 36 | 82005 |
| 37 | 85827 |
| 38 | 89595 |
| 39 | 89817 |
| 40 | 107505 |