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 | 25 |
| 3 | 63 |
| 4 | 129 |
| 5 | 231 |
| 6 | 377 |
| 7 | 575 |
| 8 | 833 |
| 9 | 1159 |
| 10 | 1561 |
| 11 | 2047 |
| 12 | 2625 |
| 13 | 3303 |
| 14 | 4089 |
| 15 | 4991 |
| 16 | 6017 |
| 17 | 7175 |
| 18 | 8473 |
| 19 | 9919 |
| 20 | 11521 |
| 21 | 13287 |
| 22 | 15225 |
| 23 | 17343 |
| 24 | 19649 |
| 25 | 22151 |
| 26 | 24857 |
| 27 | 27775 |
| 28 | 30913 |
| 29 | 34279 |
| 30 | 37881 |
| 31 | 41727 |
| 32 | 45825 |
| 33 | 50183 |
| 34 | 54809 |
| 35 | 59711 |
| 36 | 64897 |
| 37 | 70375 |
| 38 | 76153 |
| 39 | 82239 |